Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction :: GCSE Chemistry Coursework Investigation

Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction PLANNING – Title – Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction. Introduction – The rate of reaction can be defined as the speed at which a reaction takes place. The rate of reaction tells us how quickly a chemical reaction has happened. There are many things that can affect the rate of reaction, (some of these are shown in figure 1 below.) In this coursework I am going to investigate what effect the change in acid concentration has on a chemical reaction. I will do this through a series of experiments, where I will change the concentration of hydrochloric acid by mixing it with water. I will measure the reaction by recording the amount of gas given off in 60 seconds for each experiment. I plan to keep the total amount of liquid used in the experiments at a constant 20ml. This way I can measure the concentration of the acid I use each time. Aim – To find out if the rate of reaction is effected by the concentration of an acid. Variables – I have decided to focus on the effect concentration of acid has on the rate of reaction. To get accurate results, I have to make sure all my experiments are run fairly. To achieve this I will keep all my variables constant, except the one I’m investigating, the concentration of the acid. The temperature, equipment and amount of substances I use will be kept the same for all my experiments. I will also make sure the substances I use are all prepared in the same way before each experiment. This will avoid change in surface area. (E.g. I wont crush a substance one time and keep It whole the next) In all my experiments I will keep the magnesium whole. To control the temperature of the acid, I will use a thermometer to monitor it and make sure the temperature is the same for each experiment I do. (this will most likely be at room temp. around 27degrees.) All my equipment will be kept identical to any other one of my experiments, and I will use the same size measuring cylinder (20ml) to measure out the acid and water. The concentration of the acid is the only variable I will change throughout my investigation. I will do this by weakening the solution with water, starting with a very acidic solution and gradually diluting it. This will be done by measuring the water and acid in the Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction :: GCSE Chemistry Coursework Investigation Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction PLANNING – Title – Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction. Introduction – The rate of reaction can be defined as the speed at which a reaction takes place. The rate of reaction tells us how quickly a chemical reaction has happened. There are many things that can affect the rate of reaction, (some of these are shown in figure 1 below.) In this coursework I am going to investigate what effect the change in acid concentration has on a chemical reaction. I will do this through a series of experiments, where I will change the concentration of hydrochloric acid by mixing it with water. I will measure the reaction by recording the amount of gas given off in 60 seconds for each experiment. I plan to keep the total amount of liquid used in the experiments at a constant 20ml. This way I can measure the concentration of the acid I use each time. Aim – To find out if the rate of reaction is effected by the concentration of an acid. Variables – I have decided to focus on the effect concentration of acid has on the rate of reaction. To get accurate results, I have to make sure all my experiments are run fairly. To achieve this I will keep all my variables constant, except the one I’m investigating, the concentration of the acid. The temperature, equipment and amount of substances I use will be kept the same for all my experiments. I will also make sure the substances I use are all prepared in the same way before each experiment. This will avoid change in surface area. (E.g. I wont crush a substance one time and keep It whole the next) In all my experiments I will keep the magnesium whole. To control the temperature of the acid, I will use a thermometer to monitor it and make sure the temperature is the same for each experiment I do. (this will most likely be at room temp. around 27degrees.) All my equipment will be kept identical to any other one of my experiments, and I will use the same size measuring cylinder (20ml) to measure out the acid and water. The concentration of the acid is the only variable I will change throughout my investigation. I will do this by weakening the solution with water, starting with a very acidic solution and gradually diluting it. This will be done by measuring the water and acid in the