Question

The solubility of Fe(OH)₃ in a buffer solution of pH = 4 is 4.32 × 10^-2 mol/L. How many times is this solubility greater than its solubility in pure water. (Ignore the hydrolysis of Fe³⁺ ions) Given: 4.32/√0.4 = 6.83

(A) 10¹¹

(B)  6.83 x 10⁶

(C)  2.16 x 10⁹

(D)  none of these 

Answer 1

Correct option  (A) 10¹¹ 

Explanation:

Comments

Please check calculations in final step:
(4.32×10^(-2))/(4.32×10^(-11) )=10^9