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Question

http://www.bi10etc.com/reaction-rates.pdf

In this experiment you detemined the dependence of the reaction rate on the concentration of potassium iodate. Devise an emperiment for determining the dependence of the rate on the concentration sulfite.

Answer 1

Step 1:

In this experiment, we study the reaction called "Iodine clock".

In this reaction, potassium iodate (KIO₃) and sodium hydrogen sulfite (NaHSO₃) react with each other.

Iodine obtained is colored.

The rate of reaction can be monitored by determining the time required for the appearance of the color of iodine.

The rate law for this reaction is

.

x is the order of the reaction with respect to the concentration of hydrogen sulfite and y is the order of the reaction with respect to the concentration of iodate ion.

Thus, reaction rate depends on the concentration of potassium iodate.

Solution:

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