Question

Dillon shakes a bottle of oil and vinegar salad dressing. The dressing mixes temporarily, but does not stay mixed. What property of the ingredients makes them separate?

The oil and vinegar have the same solubility.
The oil and vinegar have different temperatures.
The oil and vinegar have different chemical properties.
The oil and vinegar have the same saturation.

Answer 1

The correct answer is: **The oil and vinegar have different chemical properties.**

Oil is non-polar, while vinegar (which is primarily water and acetic acid) is polar. These differing chemical properties cause the two substances to be immiscible (unable to mix) and lead to their separation when not actively shaken.