Investigating the Reaction Between Hydrochloric Acid and Calcium Carbonate

Calcium Carbonate + Hydrochloric Acid Calcium Carbonate + Water + + Carbon Dioxide

CaCO3(s) + 2HC(aq) CaCl(aq) + H2O(l) + CO2(g)

The reaction between Hydrochloric Acid and Calcium Carbonate is being investigated because it produces a gas called Carbon Dioxide. This gas can be collected and is therefore a reliable result to base the investigation on.

Variable Why will this variable affect the rate of gas production?

Volume of HCl The more HCl used in this experiment would increase the rate of gas production, as there is more solution for the calcium carbonate chips to react with.

Concentration of HCl There are more reactant particles, therefore a greater chance of them colliding. So there are more collisions, increasing the rate.

Temperature of HCl The reactant particles are moving quicker and more particles have activation energy. There are more collisions, which increases the rate.

Time gas collected for If there is more time than more particles are colliding, increasing the rate of gas collected.

Mass of calcium A grater mass of calcium means there are more particles to collide, increasing the rate.

Surface Area of Calcium Carbonate If the surface area is increased, there are more exposed to the other reactant. The reactant particles collide more often so the rate increases.

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