Experiments to measure the rate of reaction
1 mark · EasyState the name of the solid reactant used in the reaction with hydrochloric acid to produce carbon dioxide gas.
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calcium carbonate
Also accept: marble chips; CaCO3
Common mistakes: sodium carbonate
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Marking points
B1 · 1 mark · States 'calcium carbonate', 'marble chips' or 'CaCO3'.
Worked solution
The solid reactant is calcium carbonate (CaCO3), commonly known as marble chips.