2HCl + CaCO3 → CaCl2 + H2O + CO2
A. Increasing the concentration of the acid
B. Increasing the surface area of CaCO3
C. A and B
D. Reducing the concentration of the acid
Correct Answer:
Option C – A and B
Explanation
The following factors increase the reaction rate:
– Increase in concentration of reactants
– Increase in temperature
– Addition of catalyst
– Increase in the surface area of reactant(s)

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