O-LevelChemistryAcids, Bases & Salts5070/12 · May/June 2022 · Q261 Mark
Three dilute solutions of acid, each with a concentration of 0.01 mol/dm³, are reacted separately with excess calcium carbonate until there is no further reaction. The same volume of acid is used each time. The carbon dioxide produced is collected and its volume measured. All measurements are at room temperature and pressure. What are the possible identities of the acids?
Ahydrochloric (acid 1), sulfuric (acid 2), ethanoic (acid 3)
Bhydrochloric (acid 1), nitric (acid 2), ethanoic (acid 3)
Cnitric (acid 1), sulfuric (acid 2), hydrochloric (acid 3)
Dsulfuric (acid 1), hydrochloric (acid 2), nitric (acid 3)
✓ Correct answer
A: hydrochloric (acid 1), sulfuric (acid 2), ethanoic (acid 3)
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