Molarity of Aqueous Solutions

Question 1

Calculate the molarity of each lithium hydroxide solution, LiOH (aq).

a) 2.20 mol of solute in 0.976 L of solution

b) 2.20 g of solute in 57.8 mL of solution

Answer 1

a) 2.25 M

b) 1.59 M

Question 2

Calculate the molarity of each glucose solution, C6H12O6 (aq).

a) 12.22 mol of solute in 5.0 L of solution

b) 12.22 g of solute in 500.0 mL of solution

Answer 2

a) 2.4 M

b) 0.1357 M

Question 3

Determine the characteristics of 5.620 g of solute in a 0.65 M potassium nitrate solution, KNO3 (aq).

a) Calculate the moles of solute.

b) Calculate the volume of the solution.

Answer 3

a) 0.05558 mol

b) 0.086 L

Question 4

Determine the characteristics of 4.78 mL of a 2.0 M potassium hydroxide solution, KOH (aq).

a) Calculate the moles of solute.

b) Calculate the mass of the solute.

Answer 4

a) 0.0096 mol

b)0.54 g

Question 5

Determine the characteristics of various solutions of ammonium chloride, NH4Cl (aq).

a) After diluting 1.3 mL to 6.8 mL, the final concentration is 0.20 M. What was the original concentration?

b) After diluting 19.1 mL of a 0.98 M solution to 0.921 L, what is the final concentration?

c) After diluting a 0.825 M solution, a 0.212 M solution has a volume of 0.341 L. What was the original volume?

d) After diluting 64.5 mL of a 2.6 M solution to 1.8 M, what is the final volume?

Answer 5

a) 1.0 M

b) 0.020 M

c) 0.0876 L

d) 93 mL

Question 6

Determine the characteristics of various solutions of hydrochloric acid, HCl (aq).

a) After diluting 50.3 mL of a 0.971 M solution to 0.692 M, what is the final volume?

b) After diluting 136 mL of a 0.39 M solution to 0.250 L, what is the final concentration?

c) After diluting 330 mL to 671 mL, the final concentration is 0.05 M. What was the original concentration?

d) After diluting a 1.0 M solution, a 0.356 M solution has a volume of 0.918 L. What was the original volume?

Answer 6

a) 70.6 mL

b) 0.21 M

c) 0.1 M

d) 0.33 L