Multiple Choice
Which of the following is the correctly balanced equation for the reaction of MnO4^- with Fe^2+ in acidic solution?
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3. Chemical Reactions
Balancing Chemical Equations
Multiple Choice
Which of the following is the correctly balanced chemical equation for the reaction between NaCl(aq) and Hg2(C2H3O2)2(aq)?
A
2 NaCl(aq) + Hg2(C2H3O2)2(aq) → Na2C2H3O2(aq) + Hg2Cl2(s)
B
2 NaCl(aq) + Hg2(C2H3O2)2(aq) → 2 NaC2H3O2(aq) + Hg2Cl2(s)
C
NaCl(aq) + Hg2(C2H3O2)2(aq) → Na2C2H3O2(aq) + Hg2Cl2(s)
D
NaCl(aq) + Hg2(C2H3O2)2(aq) → NaC2H3O2(aq) + Hg2Cl2(aq)
Verified step by step guidance1
Identify the reactants and products in the given reaction: sodium chloride (NaCl) and mercury(I) acetate (Hg2(C2H3O2)2) react to form sodium acetate (NaC2H3O2) and mercury(I) chloride (Hg2Cl2).
Write the unbalanced chemical equation with correct formulas: \(\mathrm{NaCl(aq) + Hg_2(C_2H_3O_2)_2(aq) \rightarrow NaC_2H_3O_2(aq) + Hg_2Cl_2(s)}\).
Balance the mercury(I) species: since there is one Hg2 unit on both sides, mercury is already balanced.
Balance the acetate (C2H3O2) and sodium (Na) ions: mercury(I) acetate has two acetate groups, so to balance acetate and sodium on the product side, multiply sodium acetate by 2, giving \(2\ \mathrm{NaC_2H_3O_2}\).
Balance the chloride ions: since 2 moles of NaCl provide 2 chloride ions, and Hg2Cl2 contains 2 chloride ions, multiply NaCl by 2 to balance chlorides, resulting in the balanced equation: \(2\ \mathrm{NaCl(aq) + Hg_2(C_2H_3O_2)_2(aq) \rightarrow 2\ NaC_2H_3O_2(aq) + Hg_2Cl_2(s)}\).
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