what is the need of cleaning both ends of connecting wires with sand paper before using them in experiment
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If cleaning is not done at the end of electrodes, then the contamination which may present at end of electrode will come into the electrolytic solution which effects the rate of reaction. So to avoid such effects both the ends of the connecting wires should be cleaned with sand paper before using them in the experiment.
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The cleaning of both the ends of connecting wires with sand paper before using them in experiment is necessary to avoid the impurities on the electrodes from mixing with the electrolyte.
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