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

Explanation:

To determine the true statements about heterogeneous mixtures, we analyze each option:

1. "They settle out": Heterogeneous mixtures (like suspensions) have particles that can settle over time (e.g., sand in water). This is true.
2. "The proportions of solute to solvent may vary": This describes all mixtures (homogeneous or heterogeneous), as mixtures have variable composition. However, it is not a defining characteristic unique to heterogeneous mixtures.
3. "The solute is evenly distributed throughout": This describes homogeneous mixtures (solutions), where solute is uniformly dispersed. Heterogeneous mixtures have non - uniform distribution, so this is false.
4. "They are composed of two solvents and two solutes": Mixtures (including heterogeneous ones) can have any number of components (solutes/solvents), but this is not a defining trait of heterogeneous mixtures.

So the true statement is 1) They settle out.

Answer:

1. They settle out