Is Salad Dressing a Homogeneous Mixture?

* Visible Components: Salad dressings often contain ingredients that don't completely mix together, like oil and vinegar. You can usually see distinct layers or droplets of these ingredients.

* Separation: Over time, many salad dressings will separate into their components. The oil will rise to the top and the vinegar or other water-based ingredients will settle at the bottom.

* Non-Uniform Composition: Because the components don't mix evenly, the composition of the dressing will vary depending on where you take a sample.

However, there are some exceptions:

* Emulsified dressings: Some dressings use emulsifiers (like egg yolks or mustard) to help the oil and vinegar mix more thoroughly and stay blended for longer. These dressings might appear more homogeneous, but they still contain distinct components that can separate over time.

In summary: While some salad dressings might seem homogeneous, they are generally classified as heterogeneous mixtures due to their visible components and tendency to separate.