객관식
To balance a chemical equation, it may be necessary to adjust the:
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3. Chemical Reactions
Balancing Chemical Equations
객관식
Which of the following is the correctly balanced chemical equation for the reaction between sodium sulfate and barium chloride to form barium sulfate and sodium chloride?
A
2 Na2SO4 + BaCl2 → BaSO4 + 2 NaCl
B
Na2SO4 + BaCl2 → BaSO4 + 2 NaCl
C
Na2SO4 + BaCl2 → 2 BaSO4 + NaCl
D
Na2SO4 + 2 BaCl2 → 2 BaSO4 + NaCl
검증된 단계별 안내1
Identify the reactants and products in the chemical reaction: sodium sulfate (Na2SO4) reacts with barium chloride (BaCl2) to form barium sulfate (BaSO4) and sodium chloride (NaCl).
Write the unbalanced chemical equation: \(\mathrm{Na_2SO_4 + BaCl_2 \rightarrow BaSO_4 + NaCl}\).
Balance the barium (Ba) atoms: there is 1 Ba atom on both sides, so Ba is balanced.
Balance the sulfate (SO4) groups: there is 1 sulfate group on both sides, so sulfate is balanced.
Balance the sodium (Na) and chloride (Cl) atoms: there are 2 Na atoms in Na2SO4 on the left, so place a coefficient of 2 before NaCl on the right to balance Na and Cl atoms, resulting in \(\mathrm{Na_2SO_4 + BaCl_2 \rightarrow BaSO_4 + 2\ NaCl}\).
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