Using the solubility product constant, calculate the minimum concentration of the sulfate ion needed to initiate the precipitation of calcium sulfate. (Calcium ion concentration is 0.30 M).

Chemistry: Principles and Reactions
8th Edition
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Author:William L. Masterton, Cecile N. Hurley
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Chapter15: Complex Ion And Precipitation Equilibria
Section: Chapter Questions
Problem 71QAP: Consider the equilibrium curve for AgCl shown below. Which of the following statements about a...
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1. Write the complete chemical reaction with states and Ksp expressions for Ca+2 and Ag*
precipitated with sodium sulfate. (Hint, you must combine the cations with agents that leave
them soluble on the reactant side of the chemical reaction).
2. Using the solubility product constant, calculate the minimum concentration of the sulfate ion
needed to initiate the precipitation of calcium sulfate. (Calcium ion concentration is 0.30 M).
3. If a solution contains 0.30M Ca2 and 0.060 M Agt, what % of the calcium ion can be
precipitated out by the addition of sodium chloride, without co-precipitation occurring? (Hint:
you can try random percentages until you find your limit. That is, you can start a low or high
percentage and move upward or downward until you reach the co-precipitation limit).
Transcribed Image Text:1. Write the complete chemical reaction with states and Ksp expressions for Ca+2 and Ag* precipitated with sodium sulfate. (Hint, you must combine the cations with agents that leave them soluble on the reactant side of the chemical reaction). 2. Using the solubility product constant, calculate the minimum concentration of the sulfate ion needed to initiate the precipitation of calcium sulfate. (Calcium ion concentration is 0.30 M). 3. If a solution contains 0.30M Ca2 and 0.060 M Agt, what % of the calcium ion can be precipitated out by the addition of sodium chloride, without co-precipitation occurring? (Hint: you can try random percentages until you find your limit. That is, you can start a low or high percentage and move upward or downward until you reach the co-precipitation limit).
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