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The solubility product constant is the constant for the dissolution of a solid substance into an Associate in Nursing solution. it’s denoted by the image Ksp. Solubility equilibrium may be a style of dynamic equilibrium that exists once a compound within the solid-state is in reaction with an answer of that compound. The solid could dissolve unchanged, with dissociation, or with reaction with another constituent of the answer, like acid or alkali. every solubility equilibrium is characterized by a temperature-dependent solubility product that functions as the Associate in Nursing constant. Solubility equilibria area unit is necessary for pharmaceutical, environmental, and lots of different situations.
IMPORTANCE OF SOLUBILITY PRODUCTS
Solubility depends on a variety of parameters amongst that lattice total heat of salt and association total heat of ions within the resolution area unit of most importance:
When a salt is dissolved in an exceedingly solvent the robust forces of attraction of substance (lattice total heat of its ions) should be overcome by the interactions between ions and therefore the solvent.
The association total heat of ions is often negative which implies that energy is discharged throughout this method.
The nature of the solvent determines the quantity of energy discharged throughout the association that’s associated with total heat.
Non-polar solvents have a little worth of association total heat, which means that this energy isn’t adequate to beat the lattice total heat.
So the salts aren’t dissolved in non-polar solvents. Hence, for salt to be dissolved in an exceedingly solvent, its association total heat ought to be larger than its lattice total heat.
Solubility depends on temperature and it’s totally different for each salt.
Also read: Important Topic of Chemistry: Nitration Sulphonation
FAQs
What is the distinction between solubility and solubility product constant?
The solubility of a substance during a solvent is the total quantity of the substance which will be dissolved within the solvent at equilibrium. On the opposite hand, the solubility product constant is an associate degree constant that gives insight into the equilibrium between the solid substance and its constituent ions that are unrelated across the answer.
Q. What is the expression for the solubility product constant of common salt?
Ans. The formula of common salt is NaCl. once dissolved in polar solvents, one common salt molecule dissociates into one Na ion and one chloride ion. This equilibrium reaction is described as follows.
NaCl ⇌ Na+ + Cl–
Therefore, the solubility product constant is expressed as:
Ksp = [Na+][Cl–]
