# Problem: The standard cell potential. E°, for this reaction is 0.79 V. 6 I- (aq) + Cr2O72- (aq) + 14H+ (aq) → 3 l2 (aq) + 2 Cr3+ (aq) + 7 H2O (l) What is the standard potential for l2 (aq) being reduced to l- (aq) given that the standard reduction potential for Cr2O72- (aq) changing to Cr3+(aq) is +1.33 V? (A) +0.54 V (B) -0.54 V (C) +0.18 V (D) -0.18 V

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###### Problem Details

The standard cell potential. E°, for this reaction is 0.79 V.

6 I(aq) + Cr2O72- (aq) + 14H(aq) → 3 l(aq) + 2 Cr3+ (aq) + 7 H2O (l)

What is the standard potential for l(aq) being reduced to l- (aq) given that the standard reduction potential for Cr2O72- (aq) changing to Cr3+(aq) is +1.33 V?

(A) +0.54 V

(B) -0.54 V

(C) +0.18 V

(D) -0.18 V

What scientific concept do you need to know in order to solve this problem?

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Based on our data, we think this problem is relevant for Professor Dixon's class at UCF.