Name _________________________________
Date _________________________ Block ____
Concentration and Dilutions
mass
molar
mass
mole
mole
Molarity Volume
For dilution problems: M1V1 = M2V2
density
For density and concentration problems: M = molar mass
Perform the following calculations. Show all work leading to your answer in the space
provided. FULL MARKS WILL NOT BE GIVEN TO ANSWERS ONLY. Remember to
include UNITS with your final answers (Concentration = M or mol/L, density = g/L, volume = mL
or L, mass = g). Place boxes around final answers.
1.
How many moles of LiCl are contained in 5.50 L of 0.850 M LiCl? (1 mark)
2.
How many moles of FeCl3 are contained in 1.50 L of 0.368 M FeCl3? (1 mark)
3.
What mass of KBr is contained in 500.0 mL of 0.235 M KBr? (2 marks)
4.
What is the concentration of CaCl2 produced when 75.0 g of CaCl2 is diluted to 950.0
mL? (2 marks)
Concentration and Dilutions
1
Chemistry 11
Quiz 4.3
5.
What volume of 0.0675 M Ba(NO3)2 contains 2.55 g of Ba(NO3)2? (2 marks)
6.
What is the concentration of the solution produced when 75.0 mL of water is added to
15.0 mL of 2.50 M KBr? (2 marks)
7.
What volume of 15.4 M HNO3 is needed to make 500.0 mL of 0.100 M HNO3?
(2 marks)
8.
What volume of 0.150 M HCl can be made from 25.0 mL of 5.00 M HCl? (2 marks)
9.
What concentration of NaCl solution is made by diluting 3.00 L of 0.850 M NaCl to
12.5 L? (2 marks)
Concentration and Dilutions
2
Chemistry 11
Concentration and Dilutions
Quiz 4.3
3
Chemistry 11
Quiz 4.3
10.
What is the density of pure liquid CHBr3 (molarity = 11.4 M)? (2 marks)
11.
What is the molarity of pure liquid C6H6 (d = 0.8787 g/mL)? (2 marks)
12.
What is the molarity of NaCl made by mixing 185.0 mL of water with 55.0 mL of
0.543 M NaCl? (2 marks)
13.
What is the concentration of CaCl2 produced by mixing 145 mL of 0.550 M CaCl2 with
55 mL of 0.135 M CaCl2? (3 marks)
Concentration and Dilutions
4
Chemistry 11
Quiz 4.3
14.
What is the molarity of the solution produced when 250.0 mL of 0.750 M KBr is boiled
down to a volume of 175 mL? (2 marks)
15.
What is the molarity of the solution produced when 150.0 mL of 0.325 M LiBr and
225.0 mL of 0.500 M LiBr are mixed and boiled down to a volume of 275.0 mL?
(3 marks)
Concentration and Dilutions
5