part 3: short answer
answer in complete sentences.
1. explain the difference between a mixture and a solution.
2. describe the difference between a solute and a solvent.
3. how does filtration separate mixtures?
4. why is distillation useful for separating liquids?

Question

Accepted Answer

### 1. Explain the difference between a mixture and a solution.
# Brief Explanations:
A mixture is a combination of two or more substances where each substance retains its own properties and they can be physically separated (e.g., a mixture of sand and water, or iron filings and sulfur). A solution is a type of homogeneous mixture where one substance (the solute) is dissolved in another substance (the solvent) at the molecular or ionic level, resulting in a uniform composition throughout (e.g., salt dissolved in water, sugar dissolved in coffee). In a solution, the solute particles are so small that they do not settle out and the mixture appears uniform, while in a heterogeneous mixture (a type of mixture), the components are visibly distinct or can be separated by simple physical means like filtration.
# Answer:
A mixture is a combination of two or more substances where each retains its properties and can be physically separated (e.g., sand - water mixture), while a solution is a homogeneous mixture where a solute dissolves in a solvent at the molecular/ionic level (e.g., salt - water solution) with uniform composition and no visible separation of components.

### 2. Describe the difference between a solute and a solvent.
# Brief Explanations:
In a solution, the solute is the substance that is dissolved. It is usually present in a smaller amount (e.g., salt in a salt - water solution, sugar in a sugar - water solution). The solvent is the substance that does the dissolving and is typically present in a larger amount. It provides the medium in which the solute dissolves (e.g., water in a salt - water or sugar - water solution, alcohol in a tincture). The solvent determines the physical state of the solution (if the solvent is liquid, the solution is usually liquid, etc.), and the solute's particles disperse within the solvent's particles.
# Answer:
In a solution, the solute is the substance being dissolved (e.g., salt in salt - water, present in smaller amount), and the solvent is the substance doing the dissolving (e.g., water in salt - water, present in larger amount and providing the dissolving medium).

### 3. How does filtration separate mixtures?
# Brief Explanations:
Filtration is used to separate heterogeneous mixtures that consist of a solid and a liquid (or a solid and a gas, but more commonly solid - liquid). A filter medium (like filter paper) with pores of a certain size is used. The mixture is poured through the filter. The solid particles, which are larger than the pores of the filter, are trapped by the filter paper, while the liquid (or gas) molecules, which are smaller than the pores, pass through the filter. For example, in a mixture of sand and water, when we filter it, the sand (solid) is trapped on the filter paper and the water (liquid) passes through, thus separating the two components.
# Answer:
Filtration separates heterogeneous solid - liquid (or solid - gas) mixtures by passing the mixture through a filter medium (e.g., filter paper) with pores. Solid particles larger than the pores are trapped, while smaller liquid (or gas) molecules pass through, separating the solid from the liquid (or gas).

### 4. Why is distillation useful for separating liquids?
# Brief Explanations:
Distillation is useful for separating liquids (in a liquid - liquid mixture or a solution with a liquid solvent and a dissolved substance) because it takes advantage of the difference in boiling points of the components. When the mixture is heated, the component with the lower boiling point will vaporize first. The vapor is then cooled and condensed back into a liquid (this condensed liquid is called the distillate). For example, in a mixture of ethanol and water, ethanol has a lower boiling point than water. By heating the mixture, ethanol vaporizes first, and then the vapor is condensed to obtain pure ethanol (or a more concentrated ethanol solution) and leave the water (or a more concentrated water solution) behind. This method is effective when the components have significantly different boiling points and when they are miscible (dissolve in each other) so that other separation methods like filtration or decantation won't work.
# Answer:
Distillation is useful for separating liquids as it uses the difference in their boiling points. The liquid with the lower boiling point vaporizes when heated, and its vapor is then condensed to separate it from the other liquid (with a higher boiling point) in the mixture, which is effective for miscible liquid mixtures.

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Question

Explanation:

1. Explain the difference between a mixture and a solution.

Answer:

2. Describe the difference between a solute and a solvent.