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Investigating the effect that concentration has on the reaction between hydrochloric acid and calcium carbonate
Aim
I plan to investigate the rate of reaction between hydrochloric acid and calcium carbonate. I will test how the acid concentration will affect the rate of reaction.
Hypothesis
I predict that the higher the concentration of acid then the faster the rate of reaction. ... Therefore the rate of reaction simply depends on how often and how hard the reacting particles collide with each other.
As I am experimenting how the concentration of acid affects the rate of reaction, I am going to explain how this is so.
Increase in HCl (more particles of HCl in the same volume)
· If the solution is made more concentrated, it means there are more particles colliding with the marble chips per second
· This makes collisions between the important particles more likely
· If they are more likely to collide, then they are more likely to react
Hence an increase in concentration causes an increase in reaction rate.
If I double the concentration, I expect the reaction rate to double also. ... This will double the amount of collisions and therefore double the rate per second. ... This is sensible as my experiment is to find out how the concentration affects the rate of reaction.
Factors To Keep Constant
There are a number of factors at which must be kept constant:
-Surface area of the Marble Chips
-Temperature at which the reaction takes place.
-Stirring Rate
-Each of the variables above affects the rate of reaction in their own ways.
Surface Area
· If a solid reactant is broken down into smaller pieces the rate of reaction increases.
Approximate Word count = 1340
Approximate Pages = 5.4
(250 words per page double spaced)
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