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Investigation to find out how concentration affects reaction rate Aim To find out how the concentration of hydrochloric acid affects the rate of its reaction with solid calcium carbonate Hypothesis When hydrochloric acid is reacted with calcium carbonate the equation for the reaction is: CaCO3 (s) + 2HCl (aq) CaCl2 (aq) + H2O (l) + CO2 (g) I predict that the higher the concentration of the hydrochloric acid, the more carbon dioxide will be produced, as there is more hydrochloric acid for the calcium carbonate to react with. The rate of reaction depends upon how often and how hard the reacting particles collide with each other (they have to collide hard enough for a reaction to occur). The more collisions there are, the faster the rate of reaction becomes because although the success rate of the collisions does not increase there frequency does which will increase the frequency of successful collisions. The higher the concentration...

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