A student mixes aqueous solutions of and and observes the formation of an insoluble…

CHEMISTRY · Single correct · AP · Chemistry · Chemical Reactions · Chemical Reactions

Problem

A student mixes aqueous solutions of Na2CO3\text{Na}_2\text{CO}_3 and CaCl2\text{CaCl}_2 and observes the formation of an insoluble white solid. Which of the following net ionic equations best accounts for the formation of the solid? (a) Ca2+(aq)+2 Cl−(aq)→CaCl2(s)\text{Ca}^{2+}(aq) + 2\,\text{Cl}^-(aq) \rightarrow \text{CaCl}_2(s) (b) Na2CO3(aq)+CaCl2(aq)→CaCO3(s)+2 NaCl(aq)\text{Na}_2\text{CO}_3(aq) + \text{CaCl}_2(aq) \rightarrow \text{CaCO}_3(s) + 2\,\text{NaCl}(aq) (c) Ca2+(aq)+CO32−(aq)→CaCO3(s)\text{Ca}^{2+}(aq) + \text{CO}_3^{2-}(aq) \rightarrow \text{CaCO}_3(s) (d) 2 Na+(aq)+CO32−(aq)→Na2CO3(s)2\,\text{Na}^+(aq) + \text{CO}_3^{2-}(aq) \rightarrow \text{Na}_2\text{CO}_3(s)

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