Chapter 21, Problem 7STP

To determine

The importance of identification of any stains on clothing while giving to a dry cleaner.

Explanation of Solution

Introduction:

Dry cleaners use non-polar solvents. The word dry refers to the fact that no water is used in the process.

Dry cleaning removes oil and grease stains because molecules of non-polar solute can easily mix among molecules of a non-polar solvent, It is more beneficial if the reason of the stain is also known so that they can use particular solvent for a particular stain.

Conclusion:

Thus, to identify the stains on clothing while giving to a dry cleaner is important because they use non-polar solvents which interact with a particular non-polar solute like stains and can clean them.