Balancing Electrons

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Jessica Helfond 2F
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Balancing Electrons

Postby Jessica Helfond 2F » Mon Feb 25, 2019 6:27 pm

How do you find the number of electrons to balance a redox reaction?

timothy_ho_4B
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

Re: Balancing Electrons

Postby timothy_ho_4B » Mon Feb 25, 2019 6:59 pm

You look at the charge on both sides and increase the amount of electrons to make the charges on both sides equal.

alanaarchbold
Posts: 68
Joined: Fri Sep 28, 2018 12:27 am

Re: Balancing Electrons

Postby alanaarchbold » Mon Feb 25, 2019 7:07 pm

finding the number of electrons is based on the change in the molecules. So say there's Cu2+ and it becomes Cu3+, it will have lost an electron and it will look like Cu2+ ---> Cu3+ + e-. Thus, this is the anode and it lost one electron.

Angela Grant 1D
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

Re: Balancing Electrons

Postby Angela Grant 1D » Mon Feb 25, 2019 7:32 pm

^to add, if the half-reactions have different numbers of electrons, you just multiply the reactions by whatever factors will make the electrons cancel out


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