Chapter 22, Problem 89A

Interpretation Introduction

Interpretation: To give the reason for shaking of dressing salad is required before use.

Concept Introduction: As per the general solubility rule, like dissolve like, polar compounds dissolve only in the polar solvents.

Answer to Problem 89A

The shaking is a necessary step as it helps in emulsifying and blending the oil evenly into the dressing.

Explanation of Solution

In salad dressings, olive oil is used. The bottle of salad dressing must be shaken before use as the mixture of oil that is non-polar and the polar substance is vinegar. They do not mix. It is difficult to mix these liquids as they have different solubilities. Thus, shaking helps in mixing.

Conclusion

Thus, shaking is a necessary step as it helps in emulsifying and blending the oil evenly into the dressing.