# molarity ws #1 ```Name _______________
Period ______________
Solution Worksheet #1 with Molarity
Molarity is the number of moles of a solute dissolved in 1.00 L of solution.
1. A solution in which the amount of solute dissolved is relatively small in relation to the
amount of solvent is called a___________________. In contrast, a solution in which the
amount of solute is relatively large in relation to the amount of solvent is called a
_____________ solution.
2. 2.50 moles of ethanol are mixed with 2.90 liters of solution. What is the molarity of the
resulting solution?
3. What is the molarity of a solution containing 14.2 g of HCL dissolved in enough water to
make 150.0 ml of solution?
4. What is the molarity of a solution which contains 36.2 g of NaCl dissolved in enough water
to make 2.50 L of solution?
5. What is the molarity of 750.0 ml of a solution which contains 3.00 mol of solute dissolved in
water?
6.
6. How many grams of NaOH must be added to water in order to make 750.0 ml of a 12.0
M solution?
7. How many grams of HCl must be added to water in order to make 12.0 L of 0.250 M HCl?
8. What mass of K3PO4 is required to prepare 4.00 L of 1.50 M solution?
9. What is the molarity of a solution that contains 85.0g Na2SO4 in 325 mL of solution?
10. A solution of Na2CO3 contains 53.0 g of solution 200.0 mL of solution. What is its molarity?
Solving for Volume Problems with Molarity
11. What volume of 0.750 M solution can be prepared using 90.0 g of NH4Cl? 2.24 L ans.
12. What volume of 1.40 M HC2H3O2 solution contains 0.400 mole of HC2H3O2? 0.290 L ans.
13. 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? 2.00 L ans.
14. 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? 617 ml
15. 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)2SO4? 0.337 L
16. A solution of Al(NO3)3 is 2.00 M. What volume of this solution contains 0.250 moles of
[NO3]-1 ions? 0.0417 L
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