Ksp for Cr(OH)3 is 1.6 × 10–30. What is the molar solubility of this salt in water? (A) 30 – 8.1 (B) 4 – 10 . (C) 10 . 30 – (D) 30 – 6.1

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Question

Ksp for Cr(OH)3 is 1.6 × 10–30. What is the molar solubility of this salt in water?

(A) 30 – 8.1
(B) 4 – 10 .
(C) 10 . 30 –
(D) 30 – 6.1

Prashant Kotian · Accepted Answer

Correct answer: B. Cr(OH)3 (s) Cr3+ + 3OH– s 3s Ksp = [Cr3+] [OH–]3 = s(3s)3 = 27s4 s = / 30 – 10 .       

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