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ally1h
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Homework Statement
How many electrons are transferred in the following reaction?
6 Br^- (aq) + Cr2O7^2- (aq) + 14 H^+ --> 2Cr^3+ (aq) + 7H2O + 3Br2 (l)
a) 1
b) 2
c) 3
d) 6
e) 14
Homework Equations
The Attempt at a Solution
Redox reactions really confuse me, but I gave it a shot. I took a look at the number of electrons on each side of the equation and found the following:
Left side:
6Br^- = -6
Cr2O7^2- = -2
14 H^+ = +14
Total: +6
Right side:
2Cr^3+ = +6
7H2O = 0
3 Br2 = 0
Total: 6
But this is as far as I can get. Somehow I don't think the answer is D) 6, but I really don't know. Someone please help me understand this problem?