Solubility is a characteristic physical property referring to the ability for a given substance, the solute, to dissolve in a solvent. A physical property is any aspect of an object or substance that can be measured or perceived without changing its identity. In Chemistry, a solution is a Homogeneous Mixture composed of two or more substances A solvent is a liquid or gas that dissolves a solid liquid or gaseous Solute, resulting in a Solution. [1] It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. Solvation, commonly called dissolution, is the process of attraction and association of Molecules of a Solvent with molecules or Ions of a In a Chemical process, chemical equilibrium is the state in which the chemical activities or Concentrations of the reactants and products have no net change The resulting solution is called a saturated solution. In Chemistry, a solution is a Homogeneous Mixture composed of two or more substances Certain liquids are soluble in all proportions with a given solvent, such as ethanol in water. Water is a common Chemical substance that is essential for the survival of all known forms of Life. This property is known as miscibility. Miscibility is a term commonly used in Chemistry that refers to the property of Liquids to mix in all proportions forming a Homogeneous Solution [2] Also, the equilibrium solubility can be exceeded under various conditions to give a so-called supersaturated solution, which is metastable. Solubility equilibrium is any type Chemical equilibrium between solid and dissolved states of a compound at saturation. The term supersaturation refers to a Solution that contains more of the dissolved material than could be dissolved by the Solvent under normal circumstances Metastability is a general scientific concept which describes states of delicate equilibrium [3]
In a solution, the solvent is often a liquid, which can be a pure substance or a mixture. In Chemistry, a mixture is a substance made by combining two or more different materials without a chemical reaction occurring (the objects do not bond together [4] The species that dissolves (the solute) can be a gas, another liquid, or a solid. Solubilities range widely, from infinitely soluble such as ethanol in water, to poorly soluble, such as silver chloride in water. Water is a common Chemical substance that is essential for the survival of all known forms of Life. Silver chloride is a Chemical compound with the Chemical formula Ag[[Chlorine Cl]] The term insoluble is often applied to poorly soluble compounds, though strictly speaking there are very few cases where there is absolutely no material dissolved.
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Molecular view
Solubility occurs under dynamic equilibrium. This means that solubility should be viewed as a result of two simultaneous and opposing processes: dissolution and precipitation. The solubility equilibrium occurs when the two processes proceed at the same rate.
The solubility equilibrium is relatively straightforward for covalent substances such as ethanol. When ethanol dissolves in water, the ethanol molecules remain intact but form new hydrogen bonds with the water. A hydrogen bond results from a Dipole-dipole force between an Electronegative atom and a Hydrogen atom bonded to Nitrogen, Oxygen However, when an ionic compound such as sodium chloride (NaCl) dissolves in water, the sodium chloride lattice dissociates into separate ions which are solvated (wrapped) with a coating of water molecules. An ionic bond (or electrovalent bond) is a type of Chemical bond that can often form between Metal and Non-metal Ions (or For sodium chloride in the diet see Salt. Sodium chloride, also known as common salt, table salt, or Halite, is a In Mineralogy and Crystallography, a crystal structure is a unique arrangement of Atoms in a Crystal. Dissociation in Chemistry and Biochemistry is a general process in which ionic compounds ( complexes, Molecules, or Salts) separate Solvation, commonly called dissolution, is the process of attraction and association of Molecules of a Solvent with molecules or Ions of a Nonetheless, NaCl is said to dissolve in water, because evaporation of the solvent returns crystalline NaCl.
Sometimes the term "dissolving" is applied to an irreversible chemical reaction, as with iron in nitric acid, but in such a case the thermodynamic concept of solubility does not apply. A chemical reaction is a process that always results in the interconversion of Chemical substances The substance or substances initially involved in a chemical reaction are called Nitric acid ( H[[nitrate NO3]] also known as Aqua fortis and spirit of nitre, is a highly corrosive and
When it dissolves, a solute may form several species in the solution. For example, water above the crystals of ferrous hydroxide, Fe(OH)2, will, at equilibrium, contain Fe2+, Fe(OH)+, Fe(OH)2, Fe(OH)3- and possibly other complexes. Therefore, the solubility of ferrous hydroxide depends on pH. In general, solubility in the solvent phase can be given only for a specific solute which is thermodynamically stable, and the value of the solubility will include all the species in the solution (in the example above, all the iron-containing complexes).
Factors affecting solubility
Solubility is defined for specific phases. In the Physical sciences a phase is a Set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties For example, the solubility of aragonite and calcite in water are expected to be different, even though both are the same chemical substance (calcium carbonate). Aragonite is a Carbonate mineral, one of the two common naturally occurring polymorphs of Calcium carbonate, Ca[[carbon C]] O 3 Calcite is a carbonate mineral and the most stable polymorph of Calcium carbonate ( Ca[[carbon C]] O 3 Calcium carbonate is a Chemical compound with the Chemical formula Ca[[Carbon C]] O 3
The solubility of one substance dissolving in another is determined by the balance of intermolecular forces between the solvent and solute and the entropy change that accompanies the solvation. In Physics, Chemistry, and Biology, intermolecular forces are forces that act between stable Molecules or between functional groups of In Thermodynamics (a branch of Physics) entropy, symbolized by S, is a measure of the unavailability of a system ’s Energy Factors such as temperature and pressure will alter this balance, thus changing the solubility.
Solubility may also strongly depend on the presence of other species dissolved in the solvent, for example, complex-forming anions (ligands) in liquids. The term complex in Chemistry is usually used to describe molecules or ensembles formed by the combination of Ligands and metal Ions. In Chemistry, a ligand is either an Atom, Ion, or Molecule (see also Functional group) that bonds to a central metal generally Solubility will also depend on the excess (or deficiency) of a common ion (common-ion effect) in the solution. The common-ion effect is a term used to describe the effect on a solution of two dissolved solutes that contain the same ion To a lesser extent, solubility will depend on the ionic strength of liquid solutions. The ionic strength, I, of a solution is a function of the Concentration of all Ions present in a Solution. The last two effects can be quantified using the equation for solubility equilibrium. Solubility equilibrium is any type Chemical equilibrium between solid and dissolved states of a compound at saturation.
There is also a number of less common factors which may affect solubility. Solubility may depend on the crystal (or droplet) size of the solute phase (typically, solubility will increase with the decreasing crystal size for crystals much smaller than 1 μm). For highly defective crystals, solubility may increase with the increasing degree of disorder. The last two effects, although of great practical importance, are not true solubility effects because true solubility occurs at equilbrium, which requires a perfect monocrystal. For substances dissolving in an electrochemical reaction, solubility is expected to depend on the potential of the solute phase. Electrochemistry is a branch of Chemistry that studies Chemical reactions which take place in a Solution at the interface of an electron conductor
Temperature
The solubility of a given solute in a given solvent typically depends on temperature. For around 95% of solid solutes, the solubility increases with temperature,[5] in the temperature range from about ambient to 100 °C. In liquid water at high temperatures, (e. g. , that approaching the critical temperature), the solubility of ionic solutes tends to decrease due to the change of properties and structure of liquid water (lower dielectric constant, less of a polar solvent). The critical temperature, Tc of a material is the Temperature above which distinct Liquid and Gas phases do not exist Measurement The relative static permittivity εr can be measured for static Electric fields as follows first the Capacitance of a test A solvent is a liquid or gas that dissolves a solid liquid or gaseous Solute, resulting in a Solution.
Gaseous solutes exhibit more complex behavior with temperature. This page is about the physical properties of gas as a state of matter As the temperature is raised gases usually become less soluble in water, but more soluble in organic solvents. [5]
The chart shows solubility curves for some typical inorganic salts (all solids). Salt is a Dietary mineral composed primarily of Sodium chloride that is essential for Animal life but toxic to most land plants [6] Many salts behave like barium nitrate and disodium hydrogen arsenate, and show a large increase in solubility with temperature. Barium nitrate with Chemical formula Ba( N[[oxygen O]]32 is a salt of Barium and the Nitrate Ion. Some solutes (e. g. NaCl in water) exhibit solubility which is fairly independent of temperature. A few, such as cerium(III) sulfate, become less soluble in water as temperature increases. This is sometimes referred to as "retrograte" or "inverse" solubility. Occasionally, a more complex pattern is observed, as with sodium sulfate, where the less soluble decahydrate crystal loses water of crystallization at 32 °C to form a more soluble anhydrous phase. Sodium sulfate is the Sodium salt of Sulfuric acid Hydrate is a term used in Inorganic chemistry and Organic chemistry to indicate that a substance contains Water. As a general term a substance is said to be anhydrous if it contains no Water.
Organic compounds nearly always become soluble as the temperature is raised, in most solvents. An organic compound is any member of a large class of Chemical compounds whose Molecules contain Carbon. The technique of recrystallization, used for purification of solids, depends on this differences in solubility in hot and cold solvent. Recrystallization (see also Crystallization) is a physical process that has meanings in Chemistry, Metallurgy and Geology. There are a few exceptions, such as certain cyclodextrins. Cyclodextrins (sometimes called cycloamyloses make up a family of cyclic Oligosaccharides, composed of 5 or more α-D-glucopyranoside units linked 1->4 as in Amylose [7]
Pressure
For condensed phases (solids and liquids), the pressure dependence of solubility is typically weak and usually neglected in practice. Assuming an ideal solution, the dependence can be quantified as:
where Ni is the mole fraction of the ith component in the solution, P is the pressure, the index T refers to constant temperature, Vi,aq is the partial molar volume of the ith component in the solution, Vi,cr is the partial molar volume of the ith component in the dissolving solid, and R is the universal gas constant[8]. Relationship with the Boltzmann constant The Boltzmann constant kB (often abbreviated k) may be used in place of the gas constant by working
Henry's law states that the solubility of a gas in a liquid is directly proportional to the partial pressure of that gas above the liquid, which may be written as:
where k is a temperature-dependent constant (for example, 769. Henry's Law may sometimes refer to Lenz's Law In Chemistry, Henry's law is one of the Gas laws, formulated by William Henry. In a mixture of Ideal gases each gas has a partial pressure which is the pressure which the gas would have if it alone occupied the volume 2 L•atm/mol for dioxygen (O2) in water at 298 K), p is the partial pressure (atm), and c is the concentration of the dissolved gas in the liquid (mol/L).
Polarity
A popular aphorism used for predicting solubility is "Like dissolves like"[9] This indicates that a solute will dissolve best in a solvent that has a similar polarity to itself. "Polar molecule" and "Non-polar" redirect here This is a rather simplistic view, since it ignores many solvent-solute interactions, but it is a useful rule-of-thumb. For example, a very polar (hydrophilic) solute such as urea is highly soluble in highly polar water, less soluble in fairly polar methanol, and practically insoluble in non-polar solvents such as benzene. Hydrophile, from the Greek (hydros "water" and φιλια (philia "friendship" refers to a physical property of a Molecule Urea is an Organic compound with the Chemical formula ( N[[hydrogen H]]22 C[[oxygen O]] Methanol, also known as methyl alcohol, carbinol, wood alcohol, wood naphtha or wood spirits, is a Chemical compound Benzene, or benzol, is an organic Chemical compound and a known Carcinogen with the molecular formula C 6 H 6 In contrast, a non-polar or lipophilic solute such as naphthalene is insoluble in water, fairly soluble in methanol, and highly soluble in non-polar benzene. Lipophilicity, fat-liking, refers to the ability of a Chemical compound to dissolve in fats oils lipids and non-polar solvents such as Hexane or Naphthalene, also known as naphthalin, naphthaline, tar camphor, white tar, albocarbon, or antimite and not to be [10]
Liquid solubilities also generally follow this rule. Lipophilic plant oils, such as olive oil and palm oil, dissolve in non-polar gasoline (petrol), but polar liquids like water will not mix with gasoline.
Synthetic chemists often use the different solubilities of compounds to separate and purify compounds from reaction mixtures.
Rate of dissolution
Dissolution is not always an instantaneous process. Solvation, commonly called dissolution, is the process of attraction and association of Molecules of a Solvent with molecules or Ions of a It is fast when salt and sugar dissolve in water but much slower for a tablet of aspirin or a large crystal of hydrated copper(II) sulfate. Aspirin, or acetylsalicylic acid (ASA (əˌsɛtɨlsælɨˌsɪlɨk ˈæsɨd is a Salicylate drug, often used as an Analgesic to relieve Copper(II sulfate is the Chemical compound with the formula Cu[[Sulfur S]] O 4 The speed at which a solid dissolves may depend on its crystalline properties (crystalline vs amorphous, crystal size) and the presence of polymorphism. An amorphous solid is a Solid in which there is no Long-range order of the positions of the Atoms (Solids in which there is long-range atomic order are Polymorphism in Materials science is the ability of a solid material to exist in more than one form or Crystal structure This is important in many practical systems, for example in designing methods for controlled drug delivery. Drug delivery is the method or process of administering a Critically, the dissolution rate depends on the presence of mixing and other factors that determine the degree of undersaturation in the liquid solvent film immediately adjacent to the solid solute crystal. In some cases, solubility equilibria can take a long time to establish (hours, days, months, or many years; depending on the nature of the solute and other factors). In practise, it means that the amount of solute in a solution is not always determined by its thermodynamic solubility, but may depend on kinetics of dissolution (or precipitation).
The rate of dissolution and solubility should not be confused--they are different concepts (kinetic and thermodynamic, respectively).
Quantification of solubility
Solubility is commonly expressed as a concentration, either mass concentration (g of solute per kg of solvent, g per 100 mL (dL) of solvent), molarity, molality, mole fraction or other similar descriptions of concentration. In Chemistry, concentration is the measure of how much of a given substance there is mixed with another substance In Chemistry, concentration is the measure of how much of a given substance there is mixed with another substance The maximum equilibrium amount of solute that can dissolve per amount of solvent is the solubility of that solute in that solvent under the specified conditions. The advantage of expressing solubility in this manner is its simplicity, while the disadvantage is that it can strongly depend on the presence of other species in the solvent (for example, the common ion effect).
Solubility constants are used to describe saturated solutions of ionic compounds of relatively low solubility (see solubility equilibrium). Solubility equilibrium is any type Chemical equilibrium between solid and dissolved states of a compound at saturation. Solubility equilibrium is any type Chemical equilibrium between solid and dissolved states of a compound at saturation. The solubility constant is a special case of an equilibrium constant. For a general Chemical reaction \alpha A +\beta B. \rightleftharpoons \sigma S+\tau T. It describes the balance between dissolved ions from the salt and undissolved salt. The solubility constant is also "applicable" (i. e. useful) to precipitation, the reverse of the dissolving reaction. Precipitation is the formation of a Solid in a Solution during a Chemical reaction. As with other equilibrium constants, temperature can affect the numerical value of solubility constant. Temperature is a physical property of a system that underlies the common notions of hot and cold something that is hotter generally has the greater temperature The solubility constant is more complicated than solubility. However, the value of this constant is generally independent of the presence of other species in the solvent.
Henry's law is used to quantify the solubility of gases in liquids as a function of the gas's partial pressure. Henry's Law may sometimes refer to Lenz's Law In Chemistry, Henry's law is one of the Gas laws, formulated by William Henry. In a mixture of Ideal gases each gas has a partial pressure which is the pressure which the gas would have if it alone occupied the volume It is a special case of a solubility equilibrium.
The Flory-Huggins solution theory is a theoretical model describing the solubility of polymers. Flory-Huggins solution theory is a Mathematical model of the Thermodynamics of Polymer Solutions which takes account of the great dissimilarity The Hansen Solubility Parameters and the Hildebrand solubility parameters are empirical methods for the prediction of solubility. Hansen Solubility Parameters were developed by Charles Hansen as a way of predicting if one material will dissolve in another and form a Solution. The Hildebrand solubility parameter (δ provides a numerical estimate of the degree of interaction between materials and can be a good indication of Solubility, particularly it is also possible to predict solubility from other physical constants such as the enthalpy of fusion. The standard Enthalpy of fusion (symbol \Delta{}H_{fus} also known as the heat of fusion or specific melting heat, is the amount of
The partition coefficient (Log P) is a measure of differential solubility of a compound in a hydrophobic solvent (octanol) and a hydrophilic solvent (water). In the fields of organic and Medicinal chemistry, a partition (P or distribution coefficient (D is In the fields of organic and Medicinal chemistry, a partition (P or distribution coefficient (D is In Chemistry, hydrophobicity (from the combining form of water in Attic Greek hydro- and for fear phobos) refers to the physical property of Octanol is a straight chain Fatty alcohol with eight Carbon Atoms and the molecular formula CH3(CH27OH Hydrophile, from the Greek (hydros "water" and φιλια (philia "friendship" refers to a physical property of a Molecule Water is a common Chemical substance that is essential for the survival of all known forms of Life. The logarithm of these two values enables compounds to be ranked in terms of hydrophilicity (or hydrophobicity).
Applications
Solubility is of fundamental importance in a large number of scientific disciplines and practical applications, the most obvious ones being in chemical engineering, material science, geology, and environmental science.
Solubility is often said to be one of the "characteristic properties of a substance". This means that solubility is commonly used to describe the substance, to shed light on the nature of the substance, to help to distinguish it from other substances, and to guide with an application of the substance. For example, indigo is described as "insoluble in water, alcohol, or ether but soluble in chloroform, nitrobenzene, or concentrated sulfuric acid". Indigo is the Color on the Electromagnetic spectrum between about 420 and 450 nm in Wavelength, placing it between Blue and violet
For example, solubility of a substance is useful when separating mixtures. For example, a mixture of salt (sodium chloride) and silica may be separated by dissolving the salt in water, and filtering off the undissolved silica. For sodium chloride in the diet see Salt. Sodium chloride, also known as common salt, table salt, or Halite, is a The synthesis of chemical compounds, by the milligram in a laboratory, or by the ton in industry, both make use of the relative solubilities of the desired product, as well as unreacted starting materials, byproducts, and side products to achieve separation.
Another example of this would be the synthesis of benzoic acid from phenylmagnesium bromide and dry ice. Benzoic acid, C7H6O2 (or C6H5COOH is a colorless crystalline solid and the simplest Aromatic Carboxylic acid Phenylmagnesium bromide, with the simplified formula C6H5MgBr is a a Magnesium -containing Organometallic compound. Dry ice is solid Carbon dioxide. It is commonly used as a versatile cooling agent Benzoic acid is more soluble in an organic solvent such as dichloromethane or diethyl ether, and when shaken with this organic solvent in an separatory funnel, will preferentially dissolve in the organic layer. Dichloromethane ( DCM) or methylene chloride is the Chemical compound with the formula CH2Cl2 Diethyl ether, also known as ether and ethoxyethane, is a clear colorless and highly Flammable liquid with a low Boiling point and a A separating funnel, also known as separation funnel, separatory funnel, or colloquially sep funnel, is a laboratory glassware used in Liquid-liquid The other reaction products, i. e. the magnesium bromide will remain in the aqueous layer, clearly showing that separation based on solubility is achieved. (On a practical note, the benzoic acid obtained after evaporating the organic solvent should ideally be purified by recrystallizing from hot water. )
Solubility of ionic compounds in water
Ionic compounds (salts) dissolve in water because of the attraction between positive and negative charges. A salt, in Chemistry, is defined as the product formed from the neutralisation reaction of Acids and bases. ---- Bold text Coulomb's law', developed in the 1780s by French physicist Charles Augustin de Coulomb, may be stated in scalar form For example, the salt's positive ions (i. e. Ag+) attract the partially-negative oxygens in H2O. Likewise, the salt's negative ions (i. e. Cl-) attract the partially-positive hydrogens in in H2O. Note: oxygen is partially-negative because it is more electronegative than hydrogen, and vice-versa (see:chemical polarity). " Electronegativity " is the opposite of " Electropositivity," which describes an element's ability to donate electrons "Polar molecule" and "Non-polar" redirect here
- AgCl(s) ↔ Ag+(aq) + Cl-(aq)
However, there is a limit to how much salt can be dissolved in a given volume of water (1 liter, for example). This amount is given by the solubility product (Ksp). Solubility equilibrium is any type Chemical equilibrium between solid and dissolved states of a compound at saturation. This value depends on both the type of salt (AgCl vs. NaI, for example) and the temperature of the water.
To calculate how much AgCl can dissolve in 1 liter of water, some algebra is required. First,
- Ksp = [Ag+] × [Cl-] (definition of solubility product)
- Ksp = 1. 8 × 10-10
Next, realize that [Ag+] = [Cl-] since there is always one Ag+ ion for every Cl- ion. Using this fact,
- [Ag+]2 = 1. 8 × 10-10
- [Ag+] = 1. 34 × 10-5
The result: 1 liter of water can dissolve 1. 34 × 10-5 moles of AgCl(s) at room temperature. The mole (symbol mol) is a unit of Amount of substance: it is an SI base unit, and almost the only unit to be used to measure this Compared with other types of salts, AgCl is not very soluble in water. In contrast, household table salt (NaCl) has a higher Ksp and is, therefore, more soluble.
| Soluble | Insoluble |
|---|---|
| Group I and NH4+ compounds | carbonates (except Group I, NH4+ and uranyl compounds) |
| nitrates | sulfites (except Group I and NH4+ compounds) |
| acetates (ethanoates) | phosphates (except Group I and NH4+ compounds) |
| chlorides, bromides and iodides (except Ag+, Pb2+, Cu+ and Hg22+) | hydroxides and oxides (except Group I, NH4+, Ba2+, Sr2+ and Tl+) |
| sulfates (except Ag+, Pb2+, Ba2+, Sr2+ and Ca2+) | sulfides (except Group I, Group II and NH4+ compounds) |
Solubility of organic compounds
The principle outlined above under polarity, that like dissolves like, is the usual guide to solubility with organic systems. A blue solubility chart refers to a chart with a list of Ions and how when mixed with other ions they can become Precipitates or remain aqueous Trends The alkali metals show a number of trends when moving down the group - for instance decreasing electronegativity increasing reactivity and decreasing melting and boiling Ammonium is also an old name for the Siwa Oasis in western Egypt. In Chemistry, a carbonate is a salt or Ester of Carbonic acid. Trends The alkali metals show a number of trends when moving down the group - for instance decreasing electronegativity increasing reactivity and decreasing melting and boiling Ammonium is also an old name for the Siwa Oasis in western Egypt. The uranyl ion is the dipositive Cation 2+, which forms salts with acids In Inorganic chemistry, a nitrate is a salt of Nitric acid with an Ion composed of one Nitrogen and three Oxygen atoms Sulfites (also sulphites) are compounds that contain the sulfite Ion S[[oxygen O]]32− Trends The alkali metals show a number of trends when moving down the group - for instance decreasing electronegativity increasing reactivity and decreasing melting and boiling Ammonium is also an old name for the Siwa Oasis in western Egypt. An acetate, or ethanoate, is either a salt or Ester of Acetic acid. A phosphate, an Inorganic chemical, is a salt of Phosphoric acid. Trends The alkali metals show a number of trends when moving down the group - for instance decreasing electronegativity increasing reactivity and decreasing melting and boiling Ammonium is also an old name for the Siwa Oasis in western Egypt. The chloride Ion is formed when the element Chlorine picks up one Electron to form an Anion (negatively-charged ion Cl&minus A bromide Ion is a Bromine atom with charge of −1 Compounds with bromine in formal Oxidation state −1 are called bromides An iodide Ion is an iodine atom with a &minus1 charge. Compounds with iodine in formal Oxidation state &minus1 are called iodides Silver (ˈsɪlvɚ is a Chemical element with the symbol " Ag " (argentum from the Ancient Greek: ἀργήντος - argēntos gen Characteristics Lead has a dull luster and is a dense, Ductile, very soft highly Copper (ˈkɒpɚ is a Chemical element with the symbol Cu (cuprum and Atomic number 29 Mercury (ˈmɜrkjʊri also called quicksilver or hydrargyrum, is a Chemical element with the symbol Hg ( Latinized hydrargyrum In Chemistry, hydroxide is the most common name for the diatomic Anion OH− consisting of Oxygen and Hydrogen An oxide is a Chemical compound containing at least one Oxygen atom as well as at least one other element Trends The alkali metals show a number of trends when moving down the group - for instance decreasing electronegativity increasing reactivity and decreasing melting and boiling Ammonium is also an old name for the Siwa Oasis in western Egypt. Barium (ˈbɛəriəm is a Chemical element. It has the symbol Ba, and Atomic number 56 Strontium (ˈstrɒntiəm /ˈstrɒnʃiəm/) is a Chemical element with the symbol Sr and the Atomic number 38 Thallium (ˈθæliəm is a Chemical element with the symbol Tl and Atomic number 81 Silver (ˈsɪlvɚ is a Chemical element with the symbol " Ag " (argentum from the Ancient Greek: ἀργήντος - argēntos gen Characteristics Lead has a dull luster and is a dense, Ductile, very soft highly Barium (ˈbɛəriəm is a Chemical element. It has the symbol Ba, and Atomic number 56 Strontium (ˈstrɒntiəm /ˈstrɒnʃiəm/) is a Chemical element with the symbol Sr and the Atomic number 38 Calcium (ˈkælsiəm is the Chemical element with the symbol Ca and Atomic number 20 The term sulfide ( sulphide in British English) refers to several types of Chemical compounds containing Sulfur in its lowest Oxidation Trends The alkali metals show a number of trends when moving down the group - for instance decreasing electronegativity increasing reactivity and decreasing melting and boiling Biological occurrences Beryllium's low aqueous solubility means it is rarely available to biological systems it has no known role in living organisms and when encountered Ammonium is also an old name for the Siwa Oasis in western Egypt. For example, petroleum jelly will dissolve in gasoline; both of which are lipophilic. Petroleum jelly, petrolatum or soft paraffin is a Semi-solid mixture of Hydrocarbons (with Carbon numbers mainly higher than 25 This is because petroleum jelly consists of long carbon chains, as does the gasoline. It will not, on the other hand, dissolve in alcohol or water, since the polarity of these solvents is too high. Sugar will not dissolve in gasoline, since sugar is too polar in comparison with gasoline. A mixture of gasoline and sugar can therefore be separated by filtration, or extraction with water. Filtration is a mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases by interposing a medium to fluid flow through which the fluid Liquid-liquid extraction, also known as solvent extraction and partitioning, is a method to separate compounds based on their relative solubilities in two
Solid solubility
This term is often used in the field of metallurgy to refer to the extent that an alloying element will dissolve into the base metal without forming a separate phase. Metallurgy is a domain of Materials science that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their An alloy is a Solid solution or Homogeneous mixture of two or more elements, at least one of which is a Metal, which itself has In Chemistry, the term base metal is used informally to refer to a Metal that oxidizes or corrodes relatively easily and reacts variably with The solubility line (or curve) is the line (or lines) on a phase diagram which give the limits of solute addition. In Physical chemistry, Mineralogy, and Materials science, a phase diagram is a type of graph used to show the equilibrium conditions That is, the lines show the maximum amount of a component that can be added to another component and still be in solid solution. A solid solution is a Solid - state Solution of one or more solutes in a Solvent. In microelectronic fabrication, solid solubility refers to the maximum concentration of impurities one can place into the substrate.
Incongruent dissolution
Many substances dissolve congruently, i. e. , the composition of the solid and the dissolved solute stoichiometrically match. However, some substances may dissolve incongruently, whereby the composition of the solute in solution does not match that of the solid. Incongruent transition, in chemistry is a mass transition between two phases which involves a change in composition This is accompanied by alteration of the "primary solid" and possibly formation of a secondary solid phase. However, generally, some primary solid also remains and a complex solubility equilibrium establishes. For example, dissolution of albite may result in formation of gibbsite. Albite is a plagioclase Feldspar Mineral. It is the sodium endmember of the Plagioclase Solid solution series Gibbsite, Al(OH3 is one of the mineral forms of Aluminium hydroxide. [11]
- NaAlSi3O8(s) + H+ + 7H2O = Na+ + Al(OH)3(s) + 3H4SiO4.
In this case, the solubility of albite is expected to depend on the solid-to-solvent ratio. This kind of solubility is of great importance in geology, where it results in formation of metamorphic rocks. Metamorphic rock is the result of the transformation of an existing rock type the protolith, in a process called Metamorphism, which means "change
See also
External links
- ALOGPS interactive calculation of aqueous solubility of compounds at Virtual Computational Chemistry Laboratory using several algorithms
- QUANTUM web based calculation of aqueous and DMSO solubility of compounds QUANTUM web based prediction of aqueous and DMSO solubility of compounds
- ACD/Solubility DB aqueous solubility prediction
References
- ^ Atkins' Physical Chemistry, 7th Ed. Solubility equilibrium is any type Chemical equilibrium between solid and dissolved states of a compound at saturation. The Biopharmaceutics Classification System is a guidance for predicting the intestinal Drug absorption provided by the U The Hot Water Extraction (HWE method is a method used in chemistry for extraction and for " Steam cleaning" (e by Julio De Paula, P. W. Atkins ISBN 0198792859
- ^ Clugston M. and Fleming R. (2000), p. 108
- ^ [1]: from Online Medical Dictionary, University of Newcastle Upon Tyne. Newcastle University is a leading research intensive University located in Newcastle upon Tyne in the north-east of England.
- ^ Yuen, C. (2003), Element, Compound and Mixture
- ^ a b John W. Hill, Ralph H. Petrucci, General Chemistry, 2nd edition, Prentice Hall, 1999.
- ^ Data taken from the Handbook of Chemistry and Physics, 27th edition, Chemical Rubber Publishing Co. , Cleveland, Ohio, 1943.
- ^ Salvatore Filippone, Frank Heimanna and André Rassat (2002). "A highly water-soluble 2+1 b-cyclodextrin–fullerene conjugate". Chem. Commun. 2002: 1508 - 1509. Chemical Communications, known as ChemComm, is a peer-reviewed Scientific journal. doi:. A digital object identifier ( DOI) is a permanent identifier given to an Electronic document.
- ^ E. M. Gutman, "Mechanochemistry of Solid Surfaces", World Scientific Publishing Co. , 1994.
- ^ Kenneth J. Williamson, Macroscale and Microscale Organic Experiments, p40, 2nd edition, D. C, Heath, Lexington, Mass. , 1994.
- ^ Data taken from the Merck Index, 7th edition, Merck & Co. , 1960.
- ^ O. M. Saether & P. de Caritat (ed. ) "Geochemical processes, weathering and groundwater recharge in catchments", Taylor & Francis, Rotterdam, 1997, page 6.
Dictionary
solubility
-noun
- The condition of being soluble.
- (chemistry) The amount of a substance that will dissolve in a given amount of a solvent, to give a saturated solution, under specified conditions.
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