Question

The CORRECT relationship between molar solubility (S) and solubility product (K_sp) for salt, Cr(OH)₃ is ____________.

Options

• K_sp = S³

• K_sp = 4S³

• K_sp = 27S³

• K_sp = 27S⁴

Answer 1

The CORRECT relationship between molar solubility (S) and solubility product (K_sp) for salt, Cr(OH)₃ is K_sp = 27S⁴.

Explanation:

\[\ce{Cr(OH)3_{(s)} ⇌ Cr^{3+}_{( aq)} + 3OH^-_{( aq)}}\]

x = 1, y = 3

K_sp = x^x y^y S^x+y = (1)¹ (3)³ S¹⁺³ = 27S⁴