Investigation into the effect of concentration on the rate of reaction between calcium carbonate and hydrochloric acid

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Investigation into the effect of concentration on the rate of reaction between calcium carbonate and hydrochloric acid.

Introduction

Equation: Calcium carbonate + hydrochloric acid carbon dioxide + water + calcium chloride

CaCO + HCl CO + H O + CaCl

During this reaction Carbon dioxide is formed. We measured the rate of reaction by collecting the Carbon dioxide in a gas syringe and timing how long it takes to collect 30cm of gas in the gas syringe.

Variables that Affect the Rate of Reaction:

-Concentration- if there is a higher concentration of acid then there will be a faster rate of reaction because there will be more reactant particles per unit volume, so there will therefore be more successful collisions occurring.

-Temperature- if the temperature is higher there will be a faster reaction rate. This is because the average kinetic energy of the particles will be higher and therefore the collisions will have more energy so successful collisions will increase.

-Size of chips (surface area)- If the marble chips are larger then there will be more surface area exposed and so there will be a faster reaction rate due to more