A solution A is saturated with both calcium hydroxide and calcium sulfate. Both are only sparingly soluble. (a) The pH of solution A is 12.3. Calculate the hydroxide ion concentration in moldm-3 (b) (i) Write an expression on the solubility product, Ksp, of calcium hydroxide. (ii) The numerical value of the solubility product of calcium hydroxide is 4.0 × 10-5. Calculate the concentration, in mol dm-3, of calcium ions in solution A.
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A solution A is saturated with both calcium hydroxide and calcium sulfate. Both are only sparingly soluble.
(a) The pH of solution A is 12.3. Calculate the hydroxide ion concentration in moldm-3
(b) (i) Write an expression on the solubility product, Ksp, of calcium hydroxide.
(ii) The numerical value of the solubility product of calcium hydroxide is 4.0 × 10-5. Calculate the concentration, in mol dm-3, of calcium ions in solution A.
(c) (i) Write an expression for the solubility product, Ksp, of calcium sulfate.
(ii) The numerical value of the solubility product of calcium sulfate is 2.5 x 10-5. What is the concentration of sulfate ions in solution A?
(iii) The concentration of sulfate ions in solution A is less than 5.0 x 10-3 mol dm-3, i.e., the square root of the Ksp value of calcium sulfate. Explain why this is so.
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