Calcium carbonate is sparingly soluble in water. CACO:(s) = Ca²“(aq) + CO;² (aq) Kp = 3.4 x 109 Calculate the solubility of CaCO; in sea water containing 0.01 mol L-' of Ca²* ions. (a) (b) Given the additional information below and using the Henderson Hasselbalch equation, what is the major form of carbonate in sea water and why? pH sea water = 8.1 H;CO; pKa1 = 6.35 HCO, pK2 = 10.33 (c) Write down the relevant equilibria and explain why the actual solubility of calcium carbonate (4.6 × 10-7 mol L-') is higher than the value you determined in part (a)?
Calcium carbonate is sparingly soluble in water. CACO:(s) = Ca²“(aq) + CO;² (aq) Kp = 3.4 x 109 Calculate the solubility of CaCO; in sea water containing 0.01 mol L-' of Ca²* ions. (a) (b) Given the additional information below and using the Henderson Hasselbalch equation, what is the major form of carbonate in sea water and why? pH sea water = 8.1 H;CO; pKa1 = 6.35 HCO, pK2 = 10.33 (c) Write down the relevant equilibria and explain why the actual solubility of calcium carbonate (4.6 × 10-7 mol L-') is higher than the value you determined in part (a)?
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter16: Solubility And Precipitation Equilibria
Section: Chapter Questions
Problem 70AP
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Transcribed Image Text:Calcium carbonate is sparingly soluble in water.
CaCO:(s) = Ca²"(aq) + CO;²(aq) Kp= 3.4 x 109
(a)
Calculate the solubility of CaCO; in sea water containing 0.01 mol L-ª of Ca²* ions.
(b)
Given the additional information below and using the Henderson Hasselbalch equation,
what is the major form of carbonate in sea water and why?
pH sea water = 8.1
H2CO: pKai = 6.35
HCO; pK2 = 10.33
Write down the relevant equilibria and explain why the actual solubility of calcium
carbonate (4.6 x 10-7 mol L-') is higher than the value you determined in part (a)?
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