250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M and 0.1 M AuCl. The solution was electrolyzed at 2 V by passing a current of 1 A for 15 minutes. The metal/metals e

Question

250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M  and 0.1 M AuCl. The solution was electrolyzed at 2 V by passing a current of 1 A for 15 minutes. The metal/metals electrodeposited will be:

(, )

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Strategy:
 Preferential deposition occurs for the species with the higher reduction potential (). Calculate the total charge passed and compare it with the charge required for the full deposition of the preferred metal.

Step 1: Determine the order of deposition
-  (Higher, deposits first)
-  (Lower)

Step 2: Calculate total charge passed ()
, .

Step 3: Charge required for all Gold ()
Moles of Gold in solution .
For , .

Conclusion:
Since , only some Gold will be deposited. Silver will not be

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