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Aim During this experiment I will be investigating if heating limestone and changing the concentration of the acid will affect the rate of reaction Preliminary work Before doing our main experiment we will have to conduct another experiment to see what concentration of acid we will have to use We done this using 01M 05M and 1M of Hydrochloric acid and 01g of powdered limestone we used powdered limestone as it would be a fairer test I think this as all the particles of limestone will be roughly the same size the particles have a larger surface area than cubed limestone therefore it will react the quickest If you were to use cubed limestone it wouldnt be fair as no cube will be exactly the same size In conclusion to this experiment 05M of acid was the best to use as it had the best measurable reaction time Equipment The equipment we will be using during this experiment is Goggles to protect the eyes from reactions Measuring cylinder to measure out the acid Bunsen burner to heat the acid to the right temperature Test tubes to hold first experiment in Hydrochloric acid the acid being used Powdered limestone the substance being used Triangular stand to hold the Bunsen burner Timer to time the reaction Thermometer to record the temperature Diagram Possible Variables The possible variables are Temperature of acid- this will determine how quickly the reaction happens eg the limestone reacts faster or slower under a certain temperature When the acid is heated the particles gain Amount of Hydrochloric acid used Amount of limestone used Surface area of limestone- this will determine how quickly the reaction will happen eg If the limestone is cubed or powdered Concentration of acid- this will determine whether the limestone dissolves faster or slower Input variable The variable we have decided to change is the temperature as the
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