What is the molar solubility of Al(OH)3 in 0.2 M NaOH solution ? Given that, solubility product of Al(OH)3 = 2.4 × 10-24 :

Question

What is the molar solubility of Al(OH)3 in 0.2 M NaOH solution ? Given that, solubility product of Al(OH)3 = 2.4 × 10-24 : (A)  12 × 10- 23 (B)  12 × 10- 21  (C)  3 × 10- 19 (D)  3 × 10- 22

Tardigrade Admin · Accepted Answer

Al(OH)3 leftharpoons Al+3 + 3OH- S' 0.2 + 3 (S') ≃ 0.2 S; × (0.2)3 = ksp = 2.4 × 10-24 (S') = 3 × 10-22 M

Q. What is the molar solubility of $A l (O H)_{3}$ in $0.2 M N a O H$ solution ? Given that, solubility product of $A l (O H)_{3} = 2.4 \times 1 0^{- 24}$ :

$12 \times 1 0^{- 23}$

$12 \times 1 0^{- 21}$

$3 \times 1 0^{- 19}$

$3 \times 1 0^{- 22}$

$A l (O H)_{3} ⇌ A l^{+ 3} + 3 O H^{-}$
$S^{'} 0.2 + 3 (S^{'}) ≃ 0.2$
$S; \times (0.2)^{3} = k_{s p} = 2.4 \times 1 0^{- 24}$
$(S^{'}) = 3 \times 1 0^{- 22} M$

Q. What is the molar solubility of Al(OH)3​ in 0.2MNaOH solution ? Given that, solubility product of Al(OH)3​=2.4×10−24 :

12×10−23

12×10−21

3×10−19

3×10−22