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Postby JChen_2I » Tue Feb 25, 2020 3:22 pm

Write balanced half reactions for the redox reaction of an acidified solution of potassium permanganate and iron(II) chloride.
Could someone help walk through how to get the half reactions? And why are the potassium and chlorines not included in the reactions?
Thanks in advance!

Benjamin Feng 1B
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Joined: Sat Sep 07, 2019 12:19 am

Re: 6L9

Postby Benjamin Feng 1B » Tue Feb 25, 2020 8:31 pm

You have to look at the oxidation numbers and the half reactions will involve the ones where it is changing. So, Cl stays at - and doesn't change, so it doesn't need a half reaction. On the other hand, iron is going from 2+ to 3+, and permanganate turns into a manganese ion which also changes the oxidation number.

chari_maya 3B
Posts: 108
Joined: Sat Sep 07, 2019 12:18 am

Re: 6L9

Postby chari_maya 3B » Fri Feb 28, 2020 10:39 am

Potassium and chlorine aren't used in the reaction because they are spectator ions, and their oxidation states don't change.

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