Water in cell diagram

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Justin Lau 1D
Posts: 51
Joined: Sat Jul 22, 2017 3:00 am

Water in cell diagram

Postby Justin Lau 1D » Fri Feb 16, 2018 11:09 am

Why is water not included in the cell diagrams even when it are involved in the half reactions?

Katie Lam 1B
Posts: 52
Joined: Fri Sep 29, 2017 7:06 am

Re: Water in cell diagram

Postby Katie Lam 1B » Fri Feb 16, 2018 2:24 pm

It is assumed that the cations and anions involved in the half reactions are in aqueous solution, so water doesn't need to be explicitly written.

Kelly Seto 2J
Posts: 30
Joined: Thu Jul 27, 2017 3:00 am

Re: Water in cell diagram

Postby Kelly Seto 2J » Fri Feb 16, 2018 2:25 pm

I believe it's because many of the species are stated as being aqueous in these reactions, so the water is assumed to be present. Also water is neutral so it doesn't really contribute anything to the electron balance

Yu Chong 2H
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

Re: Water in cell diagram

Postby Yu Chong 2H » Fri Feb 16, 2018 3:04 pm

The above are true but we have to also take note that water dissociates into H+ and OH- ions, during electrolysis, they may be discharged.

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