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Chemistry Homework Help => AP Chemistry => Topic started by: prasamb@yahoo.com on April 22, 2023, 10:15:46 PM

Title: Electrochemistry
Post by: prasamb@yahoo.com on April 22, 2023, 10:15:46 PM
What mass of gold from an aqueous Ag3+ solution can be produced in 2.0 hours with a current of 12 A?
Title: Re: Electrochemistry
Post by: prasamb@yahoo.com on April 22, 2023, 10:25:42 PM
32.2 gms.
Is that correct
Title: Re: Electrochemistry
Post by: chenbeier on April 23, 2023, 02:40:20 AM
The element Symbol for Gold is Au and not Ag.
Your calculation is wrong.

Faraday law m = M*I*t/(z*F)
m= 196,96 g/mol*12*2*3600/(3*96485 As) = 58,79 g
Title: Re: Electrochemistry
Post by: uma on April 23, 2023, 07:49:33 AM
Quote from: prasamb@yahoo.com on April 22, 2023, 10:25:42 PM
32.2 gms.
Is that correct
This is wrong.
Current x time (s) ---> Charge ----> moles of electrons ----> moles of Au ----> grams of Au
Answer is 58.76 g
Title: Re: Electrochemistry
Post by: prasamb@yahoo.com on April 23, 2023, 10:49:21 AM
Thanks Uma. That means, the attached here is correct?
Title: Re: Electrochemistry
Post by: uma on April 23, 2023, 11:32:26 AM
Yes it is correct