A-LevelChemistryGroup 29701/12 · Oct/Nov 2011 · Q181 Mark
Lime mortar is made from quicklime, water and sand. Over a period of time, lime mortar changes into a much harder form. Both fresh and old lime mortar react with aqueous hydrochloric acid but only the old lime mortar effervesces during the reaction. Which equation describes the change from fresh to old lime mortar?
ACaO + CO2 → CaCO3
BCaO + H2O → Ca(OH)2
CCa(OH)2 → CaO + H2O
DCa(OH)2 + CO2 → CaCO3 + H2O
✓ Correct answer
D: Ca(OH)2 + CO2 → CaCO3 + H2O
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Group 2 and see which topics are most likely to come up next.
Sign up free →