Answers

2016-03-02T21:05:38+05:30
Let the oxidation state of Cr be x 

for (potassium)K =+1 

(oxygen) O = -2 

2 + 2x - 14 = 0 

2x -12 =0 

2x = 12 

x = 12/2 

x=+6 
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