Potassium chlorate is prepared by electrolysis: . A current of x A has to be passed for 10 h to produce 10.0 g of . The value of x is . (Nearest integer) (Molar mass of , )

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Strategy:
 Relate the cell potential to the pH using the Nernst Equation for a hydrogen electrode.

Step 1: Setup Nernst Equation
Reaction: .

Assuming  for shorthand .
 (Since potential is measured relative to standard).
.

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