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Question
A particular saturated solution of silver chromate Ag2CrO4 has [Ag+] = 5 × 10−5 and [CrO4]2− = 4.4 × 10−4 M. What is the value of Ksp for Ag2CrO4?
Solution
\[\ce{Ag2CrO4_{(s)} ⇌ 2Ag^+_{( aq)} + CrO^{2-}_{4(aq)}}\]
Ksp = \[\ce{[Ag^+]^2 [CrO^{2-}_4]}\]
= (5 × 10−5)2 (4.4 × 10−4)
= 1.1 × 10−12
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