# WS - Molarity Problems 2 - 1314 p ```Molarity Problems 2
Name_________________
Date____________Per___
1. How many liters of a 2.5M solution are required to yield 150.0 grams of solute?
(molar mass of solute = 30.0 g)
2. The molar mass of Kool-Aid is 342 g/mol. If 19g of Kool-Aid powder are dissolved into 220 mL of
solution to make tasty Kool-Aid, what is it’s concentration in Molarity?
3. What is the number of moles of solute in 80 mL of a 0.35M solution?
4. What mass of sucrose, C12H22O11, is needed to make 200.0 mL of a 0.200M solution?
(C = 12.01 g; H= 1.01 g; O = 16 g)
5. What is the number of moles of solute in 600 mL of a 0.45M solution?
6. What is the molarity of a solution that contains 5 moles of solute in 2 liters of solution?
7. What is the molarity of a solution containing 50 grams of solute in 800 mL of solution?
(molar mass of solute = 25 g/mol)
8. What mass of Na2SO4 is needed to make 1.5 L of 0.333M solution? (Na = 23 g; S = 32 g; O = 16 g)
9. How many liters of a 1.25M solution are required to yield 10.0 grams of solute?
(molar mass of solute = 80.0 g)
10. Sea water contains roughly 28.0 g of NaCl per liter. What is the molarity of NaCl in sea water?
What is the molarity of the solution?
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