Problem: Gallium is produced by the electrolysis of a solution obtained by dissolving gallium oxide in concentrated NaOH(aq). Calculate the amount of Ga(s) that can be deposited from a  Ga(III) solution by a current of 0.730 A that flows for 40.0 min. 

FREE Expert Solution

We have to calculate the amount of gallium metal that is deposited on the cathode through electrolysis of a solution containing Ga3+ ions.


  • The amount of a substance deposited at an electrode can be determined through the use of Faraday’s constant.
  • Faraday’s constant is defined as 9.648x104 C charge per mol of e-.


Ga3+ has a +3 charge, so it requires 3 electrons to discharge completely and deposit as a metal.


Ga3+(aq) + 3e- → Ga(s)


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Problem Details

Gallium is produced by the electrolysis of a solution obtained by dissolving gallium oxide in concentrated NaOH(aq). Calculate the amount of Ga(s) that can be deposited from a  Ga(III) solution by a current of 0.730 A that flows for 40.0 min. 

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