Classify each of the following mixtures as homogeneous or heterogeneous: 1. Snickers bar [Select] 2. Soda [Select] 3. Rocky road ice cream [Select] 4. Cream cheese [Select] 5. Coffee [Select]
The Correct Answer and Explanation is:
Here is the classification of each mixture:
- Snickers bar – Heterogeneous
- Soda – Homogeneous (if unopened and not flat)
- Rocky road ice cream – Heterogeneous
- Cream cheese – Homogeneous
- Coffee – Homogeneous
Explanation:
Mixtures are combinations of two or more substances that are physically blended. They are classified into homogeneous and heterogeneous types.
A homogeneous mixture has a uniform composition throughout. The individual substances are not visibly separate, and the mixture appears consistent. Examples include air, saltwater, or vinegar. The particles are mixed at the molecular level, and you cannot distinguish the components by looking at them.
A heterogeneous mixture, on the other hand, has a non-uniform composition. The individual components remain physically separate and can often be seen. Examples include salads, granola, or trail mix.
- Snickers bar is heterogeneous because it contains visible chunks of caramel, nougat, peanuts, and chocolate. These components are not evenly distributed, and their different textures and appearances can be identified separately.
- Soda is considered homogeneous if it is unopened and carbonated, because the sugar, flavoring, and carbon dioxide are evenly dissolved in water. Once opened and left out, the gas may escape, causing a slight change in uniformity, but fresh soda remains a good example of a homogeneous mixture.
- Rocky road ice cream is heterogeneous because it contains marshmallows, nuts, and chocolate pieces mixed into the ice cream. These ingredients can be distinguished easily.
- Cream cheese is homogeneous because it has a smooth, consistent texture and appearance. It does not show separate components and looks the same throughout.
- Coffee (black) is homogeneous as the water, caffeine, and other soluble compounds are uniformly mixed, making it consistent in appearance and taste throughout the cup.
