Chapter 16, Problem 16.39P

Interpretation Introduction

Interpretation:

CaCO3 due to increased acidity from $C{O}_2$ dissolving in water to form carbonic acid $H_{2}C{O}_3$

$CaC{O}_3(s)\rightleftarrows C{a}^{2+}(aq)+C{O}_3{}^{2-}(aq)$

$H_{2}C{O}_3(aq)+H_{2}O(l)\rightleftarrows H_3{O}^{+}(aq)+HC{O}_3{}^{-}(aq)$

$C{O}_3{}^{2-}(aq)+H_3{O}^{+}(aq)\rightleftarrows HC{O}_3{}^{-}(aq)+H_{2}O(l)$

$CaC{O}_3(s)+H_{2}C{O}_3(aq)\rightleftarrows C{a}^{2+}(aq)+2HC{O}_3{}^{-}(aq)K=?$

Find the value of K for the overall reaction using $K_a$ values provided in the Inquiry and the value of $K_{sp}$ for $CaC{O}_3$ given as $K_{sp}=5.0\times {10}^{-9}$ and predict the effect of increasing levels of atmospheric $C{O}_2$ on molar solubility of $CaC{O}_3$.

Concept Introduction: Associated with any ionic compound is the solubility product constant $K_{sp}$ , which measures how soluble the compound will be in a solvent.