If equal volumes of AB2 and XY (both are salts) aqueous solutions are mixed, which of the following combination will give a precipitate of AY2 at 300 K ? (Given Ksp (at 300 K) for AY2 = 5.2 × 10–7) (A

Question

If equal volumes of AB2 and XY (both are salts) aqueous solutions are mixed, which of the following combination will give a precipitate of AY2 at 300 K ? (Given Ksp (at 300 K) for AY2 = 5.2 × 10–7)

(A) 3.6 × 10–3 M AB2, 5.0 × 10–4 M XY
(B) 2.0 × 10–4 M AB2, 0.8 × 10–3 M XY
(C) 1.5 × 10–4 M AB2, 1.5 × 10–3 M XY
(D) 2.0 × 10–2 M AB2, 2.0 × 10–2 M XY

Prashant Kotian · Accepted Answer

Correct answer: D. 2.0 × 10–2 M AB2, 2.0 × 10–2 M XY [A2+] = 10–2 M, [Y–] = 10–2 M Q = [A2+] [Y–]2 = 10–6 M (> Ksp) So, precipitate will be obtained.

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