What is the oxidation number of chromium in k2cr2o7? 1. ï¿¼ +12 2. ï¿¼ +2 3. ï¿¼ +3 4. ï¿¼ +6?

asked Mar 15, 2019 31.3k views

2 votes

What is the oxidation number of chromium in k2cr2o7?

1.

ï¿¼

+12

2.

ï¿¼

+2

3.

ï¿¼

+3

4.

ï¿¼

+6?

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4 votes

K₂Cr₂O₇

(+1*2) + (x*2) + (-2*7)

2 + 2x - 14 = 0
2x - 12 = 0

2x = 12

x = 12/2

x = +6...

Rachvela answered Mar 19, 2019

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