Question

Solubility product constant for calcium carbonate?

A) Ksp = [Ca2+][CO3²-]
B) Ksp = [Ca2+]²[CO3²-]
C) Ksp = [Ca2+]³[CO3²-]²
D) Ksp = [Ca2+]²[CO3²-]³

Answer 1

The solubility product constant for calcium carbonate is Ksp = [Ca2+]²[CO3²-], option B.

Step-by-step explanation:

The solubility product constant (Ksp) for calcium carbonate is option B) Ksp = [Ca2+]²[CO3²-].

To determine the solubility product constant, we set up an ICE table for the dissolution of CaCO3, where the molar solubility of CaCO3 is represented by the variable s. Each formula unit of CaCO3 dissociates into one Ca²+ ion and one CO3²- ion, so the equilibrium concentrations of each ion are equal to s.

The solubility product constant expression is Ksp = [Ca2+]²[CO3²-].