Molarity Review and Problems
Molarity is the number of moles of a solute dissolved in 1.00 L of solution.

1. What mass of K3PO4 is required to prepare 4.00 L of 1.50 M solution?
2. What mass of CH3OH is required to prepare 1.50 L of 3.00 M solution?
3. What volume of 0.750 M solution can be prepared using 90.0 g of NH4Cl?
4. What is the molarity of a solution that contains 85.0g Na2SO4 in 325 mL of solution?
5. What is the molarity of a solution that contains 210.0g of Al2(SO4)3 in 2.75 L of solution?
6. If a 0.750 M aqueous solution of NaOH is to be prepared using 18.5g NaOH, how many mL of solution can be made?
7. What is the molarity of a solution that contains 125g C2H5OH in 0.250 moles of [NO3]-1 ions?
8. What volume of 1.40 M HC2H3O2 solution contains 0.400 mole of HC2H3O2?
9. A solution of Al(NO3)3 is 2.00 M. What volume of this solution contains 0.250 moles of [NO3]-1 ions?
10. A solution of (NH4)2SO4 is to be prepared that is 2.25M in [NH4]+1. What volume of a solution can be produced using 50.g of (NH4)2SO ?
11. A mass of 98.0 g of H2SO4 is dissolved in water to prepare a 0.50 M solution. What is the volume, in L, of this solution?
12. A solution of Na2CO3 contains 53.0 g of solution 200.0 mL of solution. What is its molarity?
13. What is the molarity of a solution of HNO3 that contains 12.6 g of solute in 500.0 mL of solution?
14. How many grams of NaCl dissolved in 150.0 mL of solution if the concentration is 0.360 M?
15. How many moles of NaCl are dissolved from #14 above?


Answers:
1. 1270g
2. 144g
3. 2.24 L
4. 1.84 M
5. 0.223 M
6. 0.617 mL
7. 10.9 M
8. 0.400 L
9. 0.0417 L
10. 0.337 L
11. 2.0 L
12. 2.5 M
13. 0.400 M
14. 3.16g
15. 0.0789 moles

a couple of these answers may be wrong