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Problem 4 - Entrance Test

The solubility product (Ksp) of Ag2CrO4 is 1.1×10⁻¹². What is the solubility of Ag2CrO4 in 0.1 M AgNO3?

Correct: A

Let s be solubility. Ksp = [Ag+]^2[CrO4^2-] = (0.1 + 2s)^2 * s ≈ (0.1)^2 * s = 1.1×10⁻¹². Solving gives s = 1.1×10⁻¹⁰ M.