Chemistry: November 10, 2014
 Complete the worksheet provided. You must show all work for
credit.
 Once completed read Chapter 19, page 594 – 607 in the
Chemistry book.
o Do all Practice Problems and Section Assessments.
 If finished early you can work on your extra credit project
*Work will be collected for MULTIPLE grades on Wednesday*
Molarity Practice Worksheet
Find the molarity of the following solutions:
1)
4.5 moles of sodium chloride is dissolved to make 0.15 liters of solution.
2)
234.6 grams of Chromium (II) Phosphate is dissolved to make 0.25 liters
of solution.
3)
45.6 grams of Potassium carbonate is dissolved to make 345.6 mL of
solution.
4)
734 grams of lithium sulfate are dissolved to make 2500 mL of solution.
5)
6.7 x 10-2 grams of Pb(C2H3O2)4 are dissolved to make 3.5 mL of solution.
Dilutions Worksheet
1)
If I add 25 mL of water to 125 mL of a 0.15 M NaOH solution, what will the
molarity of the diluted solution be?
2)
If I add water to 100 mL of a 0.15 M NaOH solution until the final volume is
150 mL, what will the molarity of the diluted solution be?
3)
How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M
HCl?
4)
I have 345 mL of a 1.5 M NaCl solution. If I boil the water until the volume
of the solution is 250 mL, what will the molarity of the solution be?
5)
How much water would I need to add to 500 mL of a 2.4 M KCl solution to
make a 1.0 M solution?
Molarity and Dilution Worksheet
Find the molarity of the following solutions: (1-5)
1.
2.
3.
4.
5.
0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution.
0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution.
0.5 grams of sodium chloride is dissolved to make 0.05 mL of solution.
734 grams of lithium sulfate are dissolved to make 2500 mL of solution.
6.7 x 10-2 grams of Pb(C2H3O2)4 are dissolved to make 3.5 mL of solution.
6. Consider two solutions: In the first solution, 1.0 moles of sodium chloride
is dissolved to make 1.0 liters of solution. In the second one, 1.0 moles of
sodium chloride is added to 1.0 liters of water. Is the molarity of each
solution the same? Explain your answer.
7. How many grams of beryllium chloride are needed to make 125 mL of a
0.050 M solution?
8. The density of ethanol is 0.789 g/mL. How many grams of ethanol should
be mixed with 225 mL of water to make a 4.5% (v/v) mixture?
9. Explain how to make at least one liter of a 1.25 M ammonium hydroxide
solution.
10. What is the molarity of a solution in which 0.45 grams of sodium nitrate
are dissolved in 265 mL of solution?
11. What will the volume of a 0.50 M solution be if it contains 25 grams of
calcium hydroxide?
12. How many grams of ammonia are present in 5.0 L of a 0.050 M solution?
13. If you add 25 mL of water to 125 mL of a 0.15 M NaOH solution, what will
the molarity of the diluted solution be?
14. If you add water to 100 mL of a 0.15 M NaOH solution until the final
volume is 150 mL, what will the molarity of the diluted solution be?
15. How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M
HCl?
16. You have 345 mL of a 1.5 M NaCl solution. If you boil the water until the
volume of the solution is 250 mL, what will the molarity of the solution be?
17. How much water would you need to add to 500 mL of a 2.4 M KCl solution
to make a 1.0 M solution?