What are the correct answers and explanations for the following chemistry questions about solutions and separation techniques?

here are the answers to the questions:

8. B. Evaporation is used to separate salt from a salt solution because the water evaporates, leaving the solid salt behind.
9. C. A standard solution is a solution with a known concentration.
10. C. A volumetric flask is used to prepare a standard solution accurately because it is designed to hold a precise volume of liquid at a specific temperature.
11. The solute in a solution is the substance that: C. dissolves in the solvent.
12. B. A balance is used to measure the mass of a solute.
13. C. When reading the level of a liquid in a volumetric flask, the eye should be at the same level as the meniscus to avoid parallax error.