Name: ___________________________
Period: ______
Date: ______________
WS 9.2: Hard Molarity Problems
Directions: Solve the following Problems
1)
48.7 grams of NaOH were added to water and the resulting solution has a volume of 2.50 L. What is the Molarity of the solution?
2)
A 2.65 M solution of KNO3 has a volume of 6.50 L. How many grams of KNO3 were needed to make that solution?
3)
How many liters are needed to obtain 23.65 grams of H3PO4 from a solution with a molarity of 2.5?
4)
What is the Molarity of a solution when 21.4 grams of Mg(OH)2 are dissolved in water and the resulting volume is 200 ml?
5)
How many grams of NaF are needed to prepare a 2.5 M solution with a volume of 250 ml?
6)
A solution of 0.39 M Na2SO4 has a volume 56 ml. How many grams of Na 2SO4 are in the solution?
7)
It is found that a 1.0 L sample of river water contains 2.72 grams of NaCl. What is the molarity?
8)
121.6 grams of Fe(NO3)3 are dissolve in a aquous solution with a volume of 850 ml. What is the Molarity?
9) How many milliliters are need to obtain 12 grams of Ca3(PO4)2 from a solution with a molarity of 1.25?