Question

1. classify think about different mixtures that are in a kitchen. name and describe two homogeneous mixtures and two heterogeneous mixtures.

Explanation:

• Homogeneous mixtures: These have a uniform composition throughout.
• Vinegar: It is a solution of acetic acid in water. The acetic acid molecules are evenly distributed among water molecules, giving a uniform appearance and properties.
• Brine (salt - water solution): Salt (sodium chloride) is dissolved in water. The ions of sodium and chloride are uniformly spread in the water, and there are no visible boundaries or separations.
• Heterogeneous mixtures: These have a non - uniform composition.
• Salad dressing (oil - and - vinegar - based, without emulsification): Oil and vinegar do not mix well. The oil forms separate droplets or layers (if left to stand) in the vinegar. You can visually distinguish the different components.
• Trail mix: It contains various components like nuts, dried fruits, and maybe chocolate pieces. Each component retains its own identity, and you can pick out different parts (e.g., a raisin from a cashew nut) easily.

Answer:

• Homogeneous mixtures: Vinegar (acetic acid in water, uniform composition), Brine (salt - water solution, uniform composition).
• Heterogeneous mixtures: Salad dressing (oil and vinegar separate, non - uniform), Trail mix (different components like nuts and dried fruits, non - uniform).