The chemical reaction between marble and dilute HCl is given.
${CaCO}_{3} + 2 HCl \to {CaCl}_{2} + H_{2} O + {CO}_{2}$

a. Which gas is formed here? How can you identify this gas?

b. Suggest any two ways you would choose to increase the rate of this chemical reaction. Explain the reason.

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(a) What happens when dilute hydrochloric acid is added to sodium carbonate ? Write a balanced chemical equation of the reaction involved.

(b) Which gas is liberated when dilute hydrochloric acid reacts with sodium carbonate ? How will you test for the presence of this gas ?

H C l

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The chemical reaction between marble and dilute HCl is given.​ CaCO3+2HCl→CaCl2+H2O+CO2 a. Which gas is formed here? How can you identify this gas?​ b. Suggest any two ways you would choose to increase the rate of this chemical reaction. Explain the reason.