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The following equation shows the reaction between calcium carbonate, CaCO3 and hydrochloric acid, HCl:CaCO3(aq) + 2HCl(aq) → CaCl2(aq) + CO2 (g)­­ + H2O(l)Which of the following is the suitable method to measure the rate of reaction?
Options:
A .  Change in the temperature of the solution with time
B .  Change in the volume of carbon dioxide gas with time
C .  Change in the mass of water with time
D .  Change in the concentration of hydrochloric acid with time
Answer: Option B
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