A student mixes aqueous solutions of sodium sulfate and barium nitrate

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

Problem

A student mixes aqueous solutions of sodium sulfate and barium nitrate. After the precipitate forms and is allowed to settle, a solution of sodium carbonate is added to the same beaker without removing any products. Which ion is present from start to finish yet never participates in either reaction? (a)

\text{SO}_4^{2-}

(b)

\text{Na}^+

(c)

\text{CO}_3^{2-}

(d)

\text{Ba}^{2+}

Related theory

Double displacement reactions
Chemical Reactions and Equations

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