Physical and chemical equilibria can respond to a change in their pressure, temperature, and concentration of reactants and products. To describe the change in the equilibrium, we have a principle named Le Chatelier's principle. This we can define in terms of enegry, as the free energy change in equilibrium is zero means the system is stable. So if we are doing some changes in equilibrium, then the system having a tendency to reoestablish the equilibrium by undoing the effect we broughy. Consider the following equilibrium.
Three sparingly soluble salts `A_(2)B, AB`, and `AB_(3)` are given. If all the three having the same value of solobility products `(K_(sp))`, in the saturated solution, the correct order of their solubilites is

Options

A. `AB_(3) gt AB gt A_(2)B`
B. `AB_(3) gt A_(2)B gt AB`
C. `AB gt AB_(3) gt A_(2)B`
D. `AB gt A_(2)B gt AB_(3)`

Answer

D

Explanation

`S` of `AB = sqrt(K_(sp)) K_(sp) = S^(2)`
`S` of `A_(2)B = 3sqrt((K_(sp))/(4)) - K_(sp) = 4S^(3)`
`S` of `AB_(3) = 4sqrt((K_(sp))/(27)) = k_(SP) = 27s^(4)` ltBRgt Hence solubility of `AB gt A_(2)B gt AB_(3)`.