Rate of Reaction Between Calcium Carbonate and Hydrochloric Acid

Rate of Reaction Between Calcium Carbonate and Hydrochloric Acid

Planning

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The aim is too investigate what factors affect the rate of reaction

between calcium carbonate and hydrochloric acid.

The variable I am intending to use in the experiment is Hydrochloric

Acid. I want to find out how different strengths of acid affect the

speed of the rate of reaction.

The variables that could affect the rate of reaction are:

· Temperature

· Concentration of Acid

· Surface Area

· Increase Pressure (this is not applicable in this experiment)

· Catalyst (this is not applicable in this experiment)

· Volume

· Mass of Calcium Carbonate

· Stirring the Solution.

I will set up the experiment as shown in the diagram below. Looking at

the above variables, I have chosen to change the strength of the

Hydrochloric Acid, as there are more than five different strengths of

acid. This will let me take at least five sets of results, and if the

experiment is repeated I can take an average and create a more

accurate graph.

Prediction

I think that the higher the concentration of the acid, the faster the

reaction will occur. This relates to the collision theory and the

section of acid and concentration of it. I think the 1.75molar

hydrochloric acid is likely to be a lot faster than that of a 0.75

molar acid - the stronger the acid, the higher the likelihood of

collision, which goes onto the reaction happening faster. If there is

a higher concentration of acid, there is a higher chance of

collisions, due to more particles colliding.

Trial Runs

I took some trial runs to help me with my experiment. The first trial

run was to find out what sort of volume of acid to use. I tried 100

ml, and found after the water in the boiling tube had been displaced

the reaction still carried on a long time afterwards. I then tried 25

ml of acid and found the reaction did not last enough for the water to