Prove empirically that the solution contains starch in the test tube.

In order to empirically determine the presence of starch in a test tube, we need to know the physical and chemical properties of iodine. A qualitative reaction to starch is the reaction of the interaction of starch with iodine. Recall a cut potato, which contains a large amount of starch, if you drop an iodine solution on it, a violet-blue color will appear. Let’s compose the equation for the reaction of starch with iodine. The molecular equation of the reaction can be written as follows:

(C6H10O6) + I2 = [(C6H10O6) n] * I2.