Multiple Choice
Which of the following is the correct molecular equation for the precipitation reaction that occurs when solutions of silver nitrate (AgNO3) and sodium chloride (NaCl) are mixed?
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6. Chemical Quantities & Aqueous Reactions
Molecular Equations
Multiple Choice
What is the net ionic equation for the reaction between formic acid (HCHO2) and potassium hydroxide (KOH) in aqueous solution?
A
HCHO2(aq) + KOH(aq) → KCHO2(aq) + H2O(l)
B
H⁺(aq) + OH⁻(aq) → H2O(l)
C
HCHO2(aq) + K⁺(aq) + OH⁻(aq) → KCHO2(aq) + H2O(l)
D
HCHO2(aq) + OH⁻(aq) → CHO2⁻(aq) + H2O(l)
Verified step by step guidance1
Identify the reactants and products in the given chemical equation: HCHO2(aq) + KOH(aq) → KCHO2(aq) + H2O(l).
Write the complete ionic equation by dissociating all strong electrolytes into their ions: HCHO2(aq) + K⁺(aq) + OH⁻(aq) → K⁺(aq) + CHO2⁻(aq) + H2O(l).
Identify the spectator ions, which are ions that appear on both sides of the equation without undergoing any change. In this case, K⁺(aq) is the spectator ion.
Remove the spectator ions from the complete ionic equation to derive the net ionic equation: HCHO2(aq) + OH⁻(aq) → CHO2⁻(aq) + H2O(l).
Verify that the net ionic equation is balanced in terms of both mass and charge, ensuring that the number of atoms and the total charge are the same on both sides of the equation.
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