Aqueous solutions of magnesium chloride and sodium carbonate are mixed

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

Problem

Aqueous solutions of magnesium chloride and sodium carbonate are mixed, forming a white precipitate. Which pair of ions remains unchanged in the complete ionic equation and therefore is spectator? (a) Mg2+ and CO32−\text{Mg}^{2+} \text{ and } \text{CO}_3^{2-} (b) Na+ and Cl−\text{Na}^+ \text{ and } \text{Cl}^- (c) Mg2+ and Cl−\text{Mg}^{2+} \text{ and } \text{Cl}^- (d) Na+ and CO32−\text{Na}^+ \text{ and } \text{CO}_3^{2-}

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