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How temperature affects the rate of reaction between Marble and Hydrochloric acid Introduction This experiment will show how temperature affects the rate of reaction between marble and hydrochloric acid. CaCO3 + 2HCL = The results could be measured in several ways, one would be to time until the limestone has dissolved or the other method would be the measure the amount of air lost every x seconds, I will choose the latter because it is a more accurate way of measuring the rate of reaction. Variable Affect How to control it Size of conical flask The shape might affect how much limestone is under acid or vice versa Use the same sized and shaped flask Concentration of hydrochloric acid There would be more particles of acid in the same amount of liquid so there would be more chance for successful collisions and therefore a higher rate of reaction. Use the same concentration of acid Surface area of marble chunks The bigger the surface area...

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