At 25 oC the solubility of copper(I) chloride is 1.00 x 10-3 mol/L. Calculate the value of Ksp at this temperature. Give your answer in scientific notation to 2 SIGNIFICANT FIGURES (even though this is strictly incorrect).

4.0 × 10⁻⁹

Explanation:

Let's consider the solution of copper(I) chloride.

CuCl₂(s) ⇄ Cu²⁺(aq) + 2 Cl⁻(aq)

We can relate the solubility (S) with the solubility product constant (Ksp) using an ICE chart.

        CuCl₂(s) ⇄ Cu²⁺(aq) + 2 Cl⁻(aq)

I                             0                 0

C                           +S              +2S

E                             S                2S

The Ksp is:

Ksp = [Cu²⁺] × [Cl⁻]² = S × (2S)² = 4 S³

Ksp = 4 × (1.00 × 10⁻³)³ ≈ 4.0 × 10⁻⁹

the answer is option a.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.