Multiple Choice
Which of the following is the correctly balanced equation for the reaction: H2O2(aq) + ClO2(aq) → ClO2(aq) + O2(g)?
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3. Chemical Reactions
Balancing Chemical Equations
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What are the products formed when HNO3(aq) reacts with Na2SO3(aq)?
A
NaNO3(aq) + H2SO3(aq)
B
NaNO3(aq) + H2O(l) + SO2(g)
C
Na2SO4(aq) + H2O(l)
D
Na2SO4(aq) + HNO2(aq)
Verified step by step guidance1
Identify the reactants: HNO3(aq) and Na2SO3(aq). HNO3 is nitric acid, and Na2SO3 is sodium sulfite.
Write the balanced chemical equation for the reaction. The reaction involves an acid (HNO3) reacting with a sulfite (Na2SO3), which typically produces a salt, water, and sulfur dioxide gas.
Recognize that the reaction between an acid and a sulfite generally forms a salt (NaNO3), water (H2O), and sulfur dioxide (SO2) gas. This is a type of gas evolution reaction.
Balance the chemical equation by ensuring that the number of atoms of each element is the same on both sides of the equation. This involves adjusting coefficients as necessary.
Verify the physical states of the products: NaNO3 is aqueous (aq), H2O is liquid (l), and SO2 is a gas (g). This confirms the products as NaNO3(aq) + H2O(l) + SO2(g).
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