O-LevelChemistryRates of Reaction5070/11 · May/June 2017 · Q191 Mark
Magnesium carbonate reacts with dilute hydrochloric acid to form magnesium chloride, carbon dioxide and water. MgCO3(s) + 2HCl(aq) → MgCl2(aq) + CO2(g) + H2O(l) The rate of the reaction is found by reacting the magnesium carbonate and dilute hydrochloric acid in a conical flask. The mass of the flask and contents is measured every twenty seconds. Which graph correctly shows the change in the mass of the flask and contents with time?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AGraph showing mass of flask and contents increasing then leveling off
BGraph showing mass of flask and contents increasing linearly then leveling off
CGraph showing mass of flask and contents decreasing linearly then leveling off
DGraph showing mass of flask and contents decreasing then leveling off
✓ Correct answer
D: Graph showing mass of flask and contents decreasing then leveling off
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Rates of Reaction and see which topics are most likely to come up next.
Sign up free →