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Aim: I am trying to find out if the concentration oh hydrochloric acid will increase the rate of reaction between calcium carbonate and hydrochloric acid. Prediction: I suspect that the stronger the hydrochloric acid I use, the faster the reaction will be, more gas will be given off and more collision between particles will take place. I also think that as I dilute the acid the rate of reaction will decrease, less collision between particles will take place and as a result, less gas will be given off. I believe this because the higher the concentration of the acid, the more ions there will be. Therefore more collision between the calcium carbonate (marble chips) and the hydrochloric acid will take place. The acid particles will collide with the marble chippings causing the reaction to take place faster. If you further double the strength of the acid you will double the amount of ions. This...

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