Cr\(_2\)O\(_7\)\(^{2-}\) + 6Fe\(^{2+}\) + 14H\(^+\) → 2Cr\(^{3+}\) +6Fe\(^{3+}\) + 7H\(_2\)O. In the above , the oxidation number of chromium changed from?

Undefeated.123

6 years ago

First we find the oxidation num of Cr2O7
X+2+(-2×7)
2x+14
2x/14=7
Then we say that the charge of 2CR3+ is +3.
+7 to +3

NS XY

11 years ago

dia is no answer dan A

godwayne

12 years ago

the correct ans is A

France

12 years ago

Answer is A. +7 to+3

nkpresh

11 years ago

the answer is A

Bola148

12 years ago

Yes @ matins, they ar jst confusn pple

Myschool Paul

10 years ago

Thanks for your contributions. Correction has been made.

John olugbenga

12 years ago

Pls stop all dis confusion...d ans is A

Darasimi779

3 years ago

You can never know the value of a thing until you lose it.

Evans lds

12 years ago

I feel they were sleeping while pasting their ans

Martins patrick

12 years ago

most of ur ans are wrong

Azabol98

4 months ago

The answer is +6 and +3

Guitarido

7 years ago

D

rherbeea

1 year ago

explanation for the preparation of NaOH