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Postby 405161024 » Mon Feb 25, 2019 10:18 pm

How do we know the manganese in MnO4- has a charge of +7? Why is the charge of O4 8-?

Cole Elsner 2J
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Re: MnO4-

Postby Cole Elsner 2J » Mon Feb 25, 2019 10:22 pm

O has a charge of -2, so for of those is 8- charge total. Because the combination of Mn and O4 is -, Mn must be 7+ so when those charges are added together it matches what's given.

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