You have a solution of calcium chloride dissolved in water. You add some more solid to the solution and stir, and the solid dissolves. Then, you add just a spatula tipful of the solid and stir, and the solid does not dissolve. How could you describe the solution before and after adding the spatula tip amount?

It changed from unsaturated to saturated solution

Explanation:

Before adding the spatula tip full amount, the solution was unsaturated, but as soon as the spatula tip full amount was added and couldn't dissolve, it became unsaturated because it could not dissolve any more solute having already dissolved it maximum number of solute

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l