Chemistry · Ionic Equilibrium
A solution is 0.1 M in Cl- and 0.001 M in CrO42-. Solid AgNO3 is gradually added to it. Assuming that the addition does not change the volume, Ksp(AgCl) = 1.7 × 10-10 M2 and Ksp(Ag2CrO4) = 1.9 × 10-12 M3, select the correct statement:
- 1AgCl precipitates first because its Ksp is high.
- 2Ag2CrO4 precipitates first because its Ksp is low.
- 3Ag2CrO4 precipitates first because the amount of Ag+ needed is low.
- 4AgCl will precipitate first as the amount of Ag+ needed to precipitate is low.✓
Correct answer
AgCl will precipitate first as the amount of Ag+ needed to precipitate is low.
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