In this investigation we are going to measure the rate of reaction of marble and HCl when the concentration or surface area of marble is changed.

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Chemistry Coursework-Investigation on the rate of reaction between HCl (Hydrochloric acid) and Marble (Calcium Carbonate - CaCO3)

Aim: In this investigation we are going to measure the rate of reaction of marble and HCl when the concentration or surface area of marble is changed.

Introduction: A rate of reaction is the speed at which reactants become an end product. For a reaction to happen, the particles that are reacting have to collide. If they collide, with enough energy and pressure, then they will react. There are several factors that affect the rate of reaction.

Firstly temperature will affect the rate of reaction; if the temperature is cold the particles will move more slowly, with less energy resulting in a slower reaction. However in a hot temperature the particles move more quickly, they collide more with more energy, creating a faster rate of reaction.

Secondly concentration will affect it, the lower the concentration the more spread out the particles, so they will collide less and create a slower rate of reaction.

Thirdly using a catalyst can be used to speed up a reaction, without it being changed. The factor that we will be investigating