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Whether the voltage affects the amount of gas produced during the electrolysis of sodium chloride solution.
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Electrolysis Coursework Aim An investigation into whether the voltage affects the amount of gas produced during the electrolysis of sodium chloride solution. Prediction When electrolysis of sodium chloride solution takes place there are four ions produced. These are Na+, H+, Cl-, OH-. The sodium and hydrogen are attracted to the cathode but it is the hydrogen given off because it is the less reactive of the two. The half equation for this is H+ +2e›H2. The chloride ion and hydroxide ion will be attracted to the anode because they are both negative but it is the chloride ion that will be given off because it is always the halogen that is given off. The half equation for this is 2Cl- -2e›Cl2. I also predict that increasing the voltage which will increase the current, which will increase the number of electrons flowing which will increase the volume of gas given off. Preliminary When conducting this part of...
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