When I- is added to IO3- under acidic conditions, I2 is produced adn the solutio

Question

When I- is added to IO3- under acidic conditions, I2 is produced adn the solution becomes a brown/yellow color. The net ionic reaction is shown below.

IO3- (aq) + 5I- (aq) + 6H+ ---> 3I2 (aq) + 3 H2O

a. what is the odication state of iodine in IO3-

b. what is the oxidation state of I-?

c. what is the oxidation state of I2?

d. What species is undergoing oxidation in this reaction?

e. What species is undergoing reduction in this reaction?

f. What are the oxidizing and reducing agents in this reaction?

Explanation / Answer

we know that:

The given reaction is:

IO3-(aq) + 5 I- (aq) + 6 H+ (aq) -------> 3 I2 (aq, brown/yellow) + 3H2O (l)

The oxidation stateof iodine in IO3- is + 5.

The oxidationstate of iodine in I- is -1.

Theoxidation state of iodine in I2 is 0.

Thespecies which undergoes oxidation is I-

The species which undergoes Reduction is IO3-

The oxidizing and reducing agents in the above reaction is IO3- and I- respectively.

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