Chemistry, 30.10.2020 21:50 savannahckatz

Question: For this assignment, you will Determine how solution concentration can affect the rate of a react... For this assignment, you will Determine how solution concentration can affect the rate of a reaction. First reaction is iodide ion (I-1) with hydrogen peroxide (H2O2) in an acidic solution, and produces a slightly orange solution. 2 H+ (aq) + 2 I- (aq) + H2O2 (aq) ? I2 (aq) + 2 H2O (l)

The next reaction will be between the iodine and starch

I2 + starch ? I2-starch complex (blue-black)

Then starch is added to the iodine solution made from the first reaction, the solution will turn black immediately. Its difficult to find the rate of reaction. to be able to time this reaction, you slow it down with another reaction. Adding ascorbic acid will react with the iodine, reducing the concentration of the iodine available to react with the starch.

C6H8O6 (aq) + I2 (aq) ? 2I- (aq) + C6H6O6 (aq) + 2 H+ (aq)

When the ascorbic acid is used up, the remaining iodine molecules can react with the starch and form the black color. The more ascorbic acid you add, the slower the reaction to form the iodine-starch complex will be.

make a hypothesis about the effect of increasing the amount of ascorbic acid will have on the rate of reaction.

As the concentration of ascorbic acid was increased, did the rate of the formation of the iodine-starch complex increase or decrease? Explain your answer in terms of the chemical reactions involve

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