A student shared with the class the four following models and said that ALL of them were mixtures. Do you agree with this student's statement? Explain why or why not.
The four models are:
1. A bowl of mixed nuts
2. A bottle of salad dressing
3. A glass of lemonade
4. A cup of sugar dissolved in water
I agree with the student's statement that all of these are mixtures.
A mixture is a combination of two or more substances that are not chemically bonded together. In each of these models, there are multiple substances present that can be physically separated.
1. A bowl of mixed nuts contains a variety of different nuts mixed together. These nuts can be separated from each other.
2. A bottle of salad dressing contains oil, vinegar, and various spices mixed together. These ingredients can be separated.
3. A glass of lemonade is made by mixing lemon juice, water, and sugar. These components are not chemically bonded and can be separated.
4. A cup of sugar dissolved in water is a homogeneous mixture where the sugar particles are dispersed evenly throughout the water. The sugar can be separated from the water through processes like evaporation or filtration.
Therefore, all of these models can be classified as mixtures.