Question

7. At 60^oC, NaNO₃ has a solubility of 110 grams NaNO₃ per 100 grams of water. How many grams of NaNO₃ are needed to prepare a saturated solution using 50. grams of water?

9. To what volume would you dilute 250.0 mL of a 0.4500 M NaOH solution to obtain a 0.2700 M solution?

10. How many grams of NaNO₃ are needed to prepare a 95.00 mL solution that is 9.5% (m/v)?

11. A 140.0 mL sample of a 0.85 M H₂SO₄ solution is diluted with enough water to reduce the concentration of the solution to 0.65 M. What is the volume of the diluted H₂SO₄ solution?

12. How many milliliters of a 0.220 M NaCl solution are required in order to supply 35.0 grams of NaCl for a reaction?

13. How many liters of a 0.950 M KCl solution can be made from 65.0 grams of KCl?

14. A solution contains 0.030 mEq/L of Sn²⁺ ion. How many moles of Sn²⁺ ion are in a liter of this solution?

15. A semipermeable membrane separates a 4% starch solution and a 2% starch solution.

Initially water will flow from the 2% starch solution to the 4% starch solution.

The water level of the 2% starch solution will rise.

The 2% starch solution will be diluted.

All of these are true.

16. How many grams of solute are present in 757.0 mL of a 0.263 M H₂SO₄ solution?

17. What is the volume percent of a solution containing 15.0 mL of ethanol in 45.0 mL water assuming the volumes are additive?

19. How many grams of Li₂SO₄ are needed to prepare 275.0 mL of a 4.5% m/v Li₂SO₄ solution?

20. What type of mixture contains solute particles that are retained by a semipermeable membrane and that will settle out over time?

solution

colloidal

suspension

mixture

Answer 1