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# Rate of reaction between calcium carbonate and hydrochloric acid.

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Introduction

Andrew Mckean Rate of reaction coursework Calcium carbonate reacts with hydrochloric acid producing calcium chloride, water and carbon dioxide. CaCO3(s)+ 2HCl (aq) ----- CaCl (aq)+ H2O (L)+CO2 (g) Theory The things that could affect the rate of the reaction are surface area, concentration, temperature and catalyst. I will change the concentration of the HCl this should prove that the reaction of the HCl with calcium carbonate should be slower if the HCL is more concentrated. Prediction In my experiment I will predict that when I change the concentration of the hydrochloric acid the rate of the reaction will increase, because there is more acid then there will be more collisions therefore there will be more gases coming of the limestone, if I start to add water to the hydrochloric acid the rate of the reaction will be slower because their will be less collisions of the molecules. ...read more.

Middle

Method First I set up all my equipment and the I measured out all the amounts of acid and water that I was going to use, I got a bowl of water and put the beehive shelf in it, on top of the beehive shelf I put a tube upside down on top of I full of water, then in a test tube I put 5gs of limestone rock and 25ml of HCL then from the test tube I put a bung with a tube from it into the beehive shelf so that the bubbles produced would go into the large test tube with water in it so that I could measure that amount of gas that has come of it. I repeated the test 3 times so that I had there different sets of results each time I decreased the amount of HCL by 5ml and increased the amount of water by 5ml so that I would have different concentrations of water. ...read more.

Conclusion

If I did the experiment again I would change the amounts of acid and water that I used so that I could get more results and therefore make a better graph. I would also use a syringe o catch the bubbles in so that my results would be even more accurate. I could have also used the HCl all from the same bottle because the strengths of the acid could have been slightly different even though it said on the bottle because somebody could have put some water in the bottle before therefore my results could have been wrong. Conclusion By doing the experiment I have proved that my theory is right. It has shown that the concentration of the HCl does effect the rate of the reaction because when the acid is less concentrated then the rate of the Reaction will be slower you can see that there is less gasses produced in a given time. ...read more.

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