# Ksp from molar solubility

By John

Express Ksp in terms of molar solubility, x, for a salt with a formula of
1. AB(s)
2. AB2(s)
3. AB3(s)
4. A3B2(s)

Concepts and reason
Solubility:
Solubility is defined as the maximum amount of solute dissolved in a given amount of solvent to make a saturated solution at a particular temperature.
Molar solubility:
The molar solubility is the number of moles of solute that dissolves in a litre of solution. It is expressed as mol/L or M (molarity).

Fundamentals
Solubility product: The equilibrium constant which defines the solubility of ionic substance in water is known as solubility product. The solubility product is denoted by .
For a saturated solution, the solubility product is the product of activities of the ions, each raised to its coefficients (powers).
Consider a general reaction: The molar solubility of M ion = [M]
The molar solubility of X ion = [X]
The ions raised to the power= n and m

Let concentrations of A and B be X
The equation is as follows: The solubility equation of AB(S) is given above. The ionization of AB(S) gives .
The coefficient of ion is one and coefficient of ion is one. And the expression for AB(S) is written with respect to the equation.    