2024年4月22日发(作者：植物大战僵尸活死人版)

Concentration Calculations 1

1. Calculate the concentration of the following solutions:

a. 825 mL that contains 30.0 g of acetic acid, CH

3

OOH

b. 2500 mL that contains 49.0 g phosphoric acid, H

3

PO

4

c. 1.50 dm

3

that contains 102 g potassium hydroxide, KOH

d. 1.25 L that contains 8.50 g of sodium nitrate, NaNO

3

2. How many cubic decimeters of solution can be made from each of the following?

a. 2.00 M solution using 80.0 g NaOH

b. 0.500 M solution using 80.0 g NaOH

c. 6.00 M solution using 126 g HNO

3

d. 0.100 M solution using 170.0 g NaNO

3

3. Calculate the mass of solute in the following solution:

a. 750.0 ml of a CaCl

2

solution that is 0.500 M

b. 3000.0 mL of a KOH solution that is 2.50 M

c. 250.0 mL of a Na

2

SO

4

solution that is 2.00 M

d. 50.0 mL of a NaNO

3

solution that is 0.100 M

4. Suppose that you need 5.00 L of a 0.10 mol/L sodium nitrate solution. What mass

of sodium nitrate must you use. Describe how you would prepare this solution.

5. Suppose that you want to make as large a volume of 5.00 mol/L sodium chloride

solution as possible. You have a bottle that contains 1.17 kg of this substance.

What volume of solution can you make?

6. If 8 g of sodium hydroxide, NaOH, is dissolved in 100 mL of solution, what is the

molar concentration of this solution?

7. If 20.8 g of barium chloride, BaCl

2

, is dissolved in 200 mL of solution, what is the

molar concentration of this solution?

8. You purchased a 25 mL container of a 15% m/V hydrogen peroxide solution.

However, before the hydrogen peroxide can be used to disinfect a wound, it must

be diluted with water to a concentration of 2.55 % m/V. What will the final

volume of the solution if you dilute all 25 mL of the hydrogen peroxide that you

purchased?

9. You need 100 mL of a 0.1 mol/L hydrochloric acid, HCl, and all you have in

stock is a bottle labeled 12.0 M HCl. How can you prepare the solution you need?

10. If 0.75 L of a 5.00 M solution of HCl is diluted to a volume of 1.80 L by adding

water, what is the concentration of the resulting diluted solution?

11. How many mL of water will be required to dilute 11 mL of a 0.45 H

2

SO

4

to a

concentration of 0.12 M?

12. It is desired to produce 1.00 L of 0.05 M nitric acid, HNO

3

, by diluting 14.00 M

nitric acid. Calculate the volume of the concentrated acid and the volume of water

required for the dilution.

13. A chemist adds water to a 120 mL of a 6.0 M solution of NaOH until the final

volume is 2.0 L. What is the molarlity of the resulting solution?

14. What concentration results when 150 mL of a 0.36 M solution of magnesium

sulphate, MgSO

4

, are added to a 750 mL of water?

15. Ms. Pall needs 5.0 L of 5.0 M HCl for a class experiment and a supply of 14.6 M

solution of concentrated HCl is available. What volume of the concentrated acid

should be measured out, by Ms. Pall to add to water to make up the final volume

of 5.0 L?

16. How much of 15.4 mol/L solution of HNO

3

is needed so that the dilution results

in 150 mL of 0.200 mol/L solution?

17. Given a solution of ammonia, NH

3

, with a concentration of 15.0 mol/L, how

would you prepare 1.00 L of dilute ammonia with a concentration of 0.100 mol/L?

18. If 10.0 mL of a 0.56 mol/L solution of aluminum nitrate, Al(NO

3

)

3

, is diluted to

250.0 mL, what is…

a. The concentration of aluminum nitrate in the new solution?

b. The concentration of the nitrate ions in the new solution?

19. Calculate the concentration of the solution formed if a 25.0 mL sample of HNO

3

,

10.0 M is placed in a 500.0 mL volumetric flask and the flask is filled up to the

mark with distilled water.

20. What is the total volume of 3.0 M H

2

SO

4

, that can be prepared from 5.0 L of

concentrated sulfuric acid (18 M)?