Answer :
Final answer:
Salad dressing is categorized as a suspension; it's a heterogeneous mixture with non-uniform composition throughout. In comparison, a solution has uniformly dissolved particles, and a colloid has larger particles that do not settle.
Explanation:
Salad dressing, such as oil and vinegar salad dressing, is a suspension. This is because its composition is not uniform throughout. It's a heterogeneous mixture composed of relatively large particles that are visible and exists in two phases. On one hand, we have oil that does not mix with vinegar, and on the other hand, we have vinegar which is dispersed in oil. When left to stand for some time, the oil and vinegar separate into layers indicating it's a suspension.
In contrast, a solution is a homogeneous mixture in which no settling occurs and the dissolved species are molecules or ions, such as saltwater. A colloid, like milk, is somewhere in between a solution and a suspension. The particles are much larger than those in a solution but remain dispersed and do not settle like those in a suspension.
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It is a suspension when shaken and when it has sit for a while it is a colliod
