Use your understanding of the terms ""soluble"" and ""insoluble"" to explain why you must shake a bottle of salad dressing made with oil and vinegar before you use it.

Vinegar and oil don't mix or dissolve in same solution, and this makes them insoluble

Explanation:

Vinegar and oil don't mix or dissolve in same solution, and this makes them insoluble, that's why they must be shared so the layer of oil or vinegar doesn't remain.

An insoluble solution is a solution which the two element which makes up the compound don't dissolve themselves