Question

which statements are true of heterogeneous mixtures?

1. they settle out.
2. the proportions of solute to solvent may vary
3. the solute is evenly distributed throughout.
4. they are composed of two solvents and two solutes.

○ 1 and 2
○ 2 and 4
○ 3 only
○ 2 only

Explanation:

• For statement 1: Heterogeneous mixtures (e.g., suspensions) have particles that can settle out over time.
• For statement 2: In heterogeneous mixtures, the proportion of solute to solvent can vary in different parts of the mixture (unlike homogeneous solutions with uniform composition).
• Statement 3 is false because solute is evenly distributed in homogeneous mixtures, not heterogeneous.
• Statement 4 is false as heterogeneous mixtures don't require two solvents and two solutes; they can have different component ratios and phases, and usually have one solvent (if applicable) with non - uniformly distributed solutes/particles. So statements 1 and 2 are true.

Answer:

1 and 2