Multiple Choice
Which of the following is the balanced chemical equation for the reaction of sulfurous acid (H2SO3) with lithium hydroxide (LiOH) to form water (H2O) and lithium sulfite (Li2SO3)?
3. Chemical Reactions
Balancing Chemical Equations
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Which of the following is the balanced net ionic equation for the reaction between HClO3(aq) and NaOH(aq)?
A
HClO3(aq) + NaOH(aq) → NaClO3(aq) + H2O(l)
B
HClO3(aq) + Na⁺(aq) → NaClO3(aq) + H⁺(aq)
C
HClO3(aq) + OH⁻(aq) → ClO3⁻(aq) + H2O(l)
D
H⁺(aq) + OH⁻(aq) → H2O(l)
Verified step by step guidance1
Identify the reactants and products in the given molecular equation: HClO3(aq) + NaOH(aq) → NaClO3(aq) + H2O(l).
Write the complete ionic equation by dissociating all strong electrolytes into their ions: HClO3(aq) + Na⁺(aq) + OH⁻(aq) → Na⁺(aq) + ClO3⁻(aq) + H2O(l).
Cancel out the spectator ions that appear on both sides of the complete ionic equation. In this case, Na⁺(aq) is the spectator ion.
Write the net ionic equation by including only the species that undergo a chemical change: HClO3(aq) + OH⁻(aq) → ClO3⁻(aq) + H2O(l).
Verify that the net ionic equation is balanced in terms of both mass and charge. Ensure that the number of atoms and the total charge are the same on both sides of the equation.
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