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Whether the voltage affects the amount of gas produced during the electrolysis of sodium chloride solution.

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Introduction

ELECTROLYSIS COURSEWORK LIAM WILLIAMS 11Hr An investigation into whether the voltage affects the amount of gas produced during the electrolysis of sodium chloride solution. Prediction At the positive electrode: Na+ and H+ will be attracted. In theis case hydrogen gas will be given off because it is the least reactive of the two. ...read more.

Middle

So when the voltage is increased at the cathode - the current will be higher, this will mean there are more electrons so more gas will be given off. This is because the flow of electrons and the gas given off are proportional. PRELIMINARY WORK We conducted preliminary work, to establish a number of things regarding our experiment. ...read more.

Conclusion

The Preliminary work simply involved conducting practise experiments using different voltages for different lengths of time. The results we collected led us to decide that - We should use voltages ranging consistently from 0.2V to 1.2V and collect gas for one minute. The reason for these choices was that they resulted in readings filling little of a measuring cylinder, to filling nearly a whole cylinder respectively. These decisions would hopefully allow us to collect a an accurate set of results ...read more.

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