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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: bradenator on June 14, 2021, 12:56:35 AM

Title: How do I write a galvanic cell schematic?
Post by: bradenator on June 14, 2021, 12:56:35 AM

How do I write the cell schematic for SiO3^2-(aq) + Mg(s) —> Si(s) + Mg(OH)2(s)?

I have made a genuine attempt at trying to solve this problem but I can’t quite get it. I have been able to solve other cell schematic problems up until this point. I could not find any examples like this one in my textbook. I am also taking General Chemistry 2 online so help is limited, so any help at all is appreciated!

Title: Re: How do I write a galvanic cell schematic?
Post by: Borek on June 14, 2021, 03:35:24 AM

First step would be to determine both redox couples involved.

Note that the reaction is not balanced and the equation doesn't list all reactants involved.

Title: Re: How do I write a galvanic cell schematic?
Post by: bradenator on June 14, 2021, 10:22:00 AM

Yes, I managed to balance the reaction and ended up with    2Mg + 3H2O + SiO3^2- —> 2Mg(OH)2 + Si + 2OH^-

I’m confused about how I would write the cell schematic if there is solid mg on both sides.