Multiple Choice
Which of the following is the balanced chemical equation for the reaction between aqueous barium chloride and aqueous sodium phosphate to form solid barium phosphate and aqueous sodium chloride?
3. Chemical Reactions
Balancing Chemical Equations
Multiple Choice
Which of the following is the balanced molecular equation for the reaction between NaOH (aq) and HNO3 (aq)?
A
2NaOH(aq) + HNO3(aq) → NaNO3(aq) + 2H2O(l)
B
NaOH(aq) + HNO3(aq) → NaNO3(aq) + H2(g)
C
NaOH(aq) + HNO3(aq) → NaNO3(aq) + H2O(l)
D
NaOH(aq) + HNO3(aq) → NaNO2(aq) + H2O(l)
Verified step by step guidance1
Identify the reactants and products in the chemical reaction. The reactants are NaOH (sodium hydroxide) and HNO3 (nitric acid), and the products should be a salt and water.
Write the unbalanced chemical equation: NaOH(aq) + HNO3(aq) → NaNO3(aq) + H2O(l).
Check the conservation of mass by ensuring that the number of each type of atom is the same on both sides of the equation. Sodium (Na), nitrogen (N), and oxygen (O) atoms should be balanced.
Balance the equation by adjusting coefficients. In this case, the equation NaOH(aq) + HNO3(aq) → NaNO3(aq) + H2O(l) is already balanced as there is one Na, one N, and three O atoms on each side, along with two H atoms.
Verify that the physical states of the reactants and products are correctly indicated: NaOH and HNO3 are aqueous (aq), NaNO3 is aqueous (aq), and H2O is liquid (l).
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