Problems on Concentration and solution making - Part 1

1. Explain how to make up five liters of a 0.175 M NaCl solution.

2. What volume of 0.86 M table sugar (C12H23O12) has 50 grams of sugar in it?

3. How many grams of KMnO4 would you get if you evaporated the water from 85.75 mL of 1.27 M solution?

4. To what volume must you dilute 15 grams of silver nitrate to make it 0.05 M?

5. What is the concentration of KCl if five grams of it are in 25.3 L?

6. How many moles of chlorine gas are in 17 L of 1.02 M solution?

7. How many grams of sulfuric acid are in 5 mL of 3.2 M acid?

8. I make up 500 ml of 0.1 M sodium hydroxide solution. Explain how I did it.

9. To what volume must you take 27 g of table salt if you want a physiological saline solution? (Physiological saline is 0.15 M NaCl.)

10. What is the concentration of silver nitrate if 15 grams of it are dissolved into 14.28 liters?

Answer

1. (a) Weigh out 51.2 grams of NaCl. (b) Dissolve the solid in a small amount of water in a suitable volumetric device. (c) Bring the solution to volume by adding water (q.s.) and mix to completely disburse.
2. 0.162 L	3. 17.2 g	4. 1.77 L
5. 2.65 m mols	6. 17.34 mols	7. 1.57 g
8. (a) Weigh out 2.00 grams of NaOH. (b) Dissolve the solid in a small amount of water in a suitable volumetric device. (c) Bring the solution to volume by adding water (q.s.) and mix to completely disburse.
9. 3.08 L	10. 6.18 m molar