Question

The expression for the solubility product of $A{l}_2(S{O}_4{)}_3$ is

• A. K_sp = [Al³⁺] [SO₄^2-]
• B. K_sp = [Al³⁺]² [SO₄^2-]³
• C. K_sp = [Al³⁺]³ [SO₄^2-]²
• D. K_sp = [Al³⁺]² [SO₄^2-]²

Answer 1

The correct option is B

K_sp = [Al³⁺]² [SO₄^2-]³

Solubility of $A{l}_2(S{O}_4{)}_3$
$A{l}_2(S{O}_4{)}_3\rightleftharpoons 2A{l}^{3+}+3S{O}_4^{2-}$
$K_{sp}=\left[A{l}^{3+}{]}^2\right[S{O}_4^{2-}{]}^3$