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Which risk increases when attempting rapid electrolysis of water using a high-concentration NaCl electrolyte?

A)Electrode passivation slows down reactions
B)Equilibrium shifts favoring water formation
C)Rate is reduced drastically by osmosis
D)Overpotential causes unwanted chlorine production

💡 Explanation

Increased cell voltage increases overpotential on both electrodes, because of the Nernst equation; therefore chlorine production at the anode increases rather than only oxygen, decreasing efficiency, passivation is unrelated, and pressure is not necessarily related to hydrolysis rate.

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