Chemistry · May / June 2022 · Paper 12 · Question 12

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Aqueous silver nitrate, AgNO3, reacts with aqueous potassium chromate(VI), K2CrO4, to give a yellow precipitate. What is the ionic equation for this reaction?

A2AgNO3(aq) + K2CrO4(aq) → Ag2CrO4(s) + 2KNO3(aq)
B2Ag+(aq) + 2NO3–(aq) + 2K+(aq) + CrO4^2–(aq) → Ag2CrO4(s) + 2NO3–(aq) + 2K+(aq)
C2Ag+(aq) + CrO4^2–(aq) → Ag2CrO4(s)
DAg+(aq) + CrO4–(aq) → AgCrO4(s)

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Correct answer: C. 2Ag+(aq) + CrO4^2–(aq) → Ag2CrO4(s)

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