A student mixes aqueous solutions of CaCl₂ and K₂CO₃

CHEMISTRY · Single correct · A Level · Chemistry · Reactions of ions in aqueous solution · Reactions of ions in aqueous solution

Problem

A student mixes aqueous solutions of CaCl₂ and K₂CO₃. The balanced molecular equation for the reaction is CaCl₂(aq) + K₂CO₃(aq) → 2 KCl(aq) + CaCO₃(s) Which of the following is the correct net ionic equation for this reaction? (a) Ca2+(aq)+CO32−(aq)  →  CaCO3(aq)\text{Ca}^{2+}(aq)+\text{CO}_3^{2-}(aq)\;\rightarrow\;\text{CaCO}_3(aq) (b) Ca2+(aq)+CO32−(aq)  →  CaCO3(s)\text{Ca}^{2+}(aq)+\text{CO}_3^{2-}(aq)\;\rightarrow\;\text{CaCO}_3(s) (c) 2 Ca2+(aq)+CO32−(aq)  →  Ca2CO3(s)2\,\text{Ca}^{2+}(aq)+\text{CO}_3^{2-}(aq)\;\rightarrow\;\text{Ca}_2\text{CO}_3(s) (d) Ca2+(aq)+2 Cl−(aq)+2 K+(aq)+CO32−(aq)  →  2 K+(aq)+2 Cl−(aq)+CaCO3(s)\text{Ca}^{2+}(aq)+2\,\text{Cl}^{-}(aq)+2\,\text{K}^{+}(aq)+\text{CO}_3^{2-}(aq)\;\rightarrow\;2\,\text{K}^{+}(aq)+2\,\text{Cl}^{-}(aq)+\text{CaCO}_3(s)

Related theory

Browse the problem library