How many electrons does each gold atom gain? How many electrons does each iodine atom lose? What is the total number of electrons that are moved in the oxidation-reduction reaction? Complete the final balanced equation based on the half-reactions.

3 , 1 , 6 , 2 , 6 , 2 , 3 , 6

Explanation:

Half equation:

I. Au3+ + 3e- --> Au

II. 2I- --> I2 + 2e-

Au3+ + 3e- --> Au. ×2

2I- --> I2 + 2e- ×3

2Au3+ + 6e- --> 2Au

6I- --> 3I2 + 6e-

Overall equation

AuI3 --> 2Au + 3I2

A.

3 electrons

B.

2 electrons

C.

6 electrons

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