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Name _____ Period _____ MOLARITY WORKSHEET #1 For each of the following problems, use proper units and show ALL work:
Molarity Worksheet W 331 Everett Community College Student Support Services Program What is the molarity of the following solutions given that:
Molarity Worksheet 1 1. What does molarity mean? 2. What is the molarity of a solution that contains 4.53 moles of lithium nitrate in 2.85 liters of solution?
Molarity Problems Worksheet M = _n_ - n= # moles V - V must be in liters (change if necessary) - Use M or mol/L as unit for molarity 1. What is the molarity of a 0
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Molarity Practice Problems 1) ... Molarity Practice Problems – Answer Key 1) How many grams of potassium carbonate are needed to make 200 mL of a 2.5 M solution?
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Homework Answers Molarity & Molality Worksheet Student Due Date 3/29/10 Concentration Problems: (Show your work for full credit!) 1) If you dissolve 20.0 g of NaOH in
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KEY Name______________
Worksheet: Molarity
Molarity: quantitative • a _______________ description of solution concentration. M • Abbreviated _______________
moles of solute Molarity = ________________ liters of solution
Problems: Show all work and circle your final answer. 1. To make a 4.00 M solution, how many moles of solute will be needed if 12.0 liters of solution are required? 4.00 M =
moles of solute 12.0 L
moles of solute = 48.0 mol
2. How many moles of sucrose are dissolved in 250 mL of solution if the solution concentration is 0.150 M? 1L = 0.25 L 1000 mL moles of solute 0.150 M = moles of solute = 0.038 mol 0.25 L
? L = 250 mL ×
3. What is the molarity of a solution of HNO3 that contains 12.6 grams HNO3 in 1.0 L of solution? ? mol HNO3 = 12.6 g HNO3 ×
M=
1 mol HNO3 = 0.200 mol HNO3 63.0 g HNO3
0.200 mol HNO3 = 0.200 M 1.0 L
4. How many grams of potassium nitrate are required to prepare 0.250 L of a 0.700 M solution? 0.700 M =
5. 125 cm3 of solution contains 3.5 moles of solute. What is the molarity of the solution? ? g KNO3 = 0.175 mol KNO3 × M=
101.1 g KNO3 = 17.7 g KNO3 1 mol KNO3
3.5 mol = 28 M 0.125 L
6. Which solution is more concentrated? Solution “A” contains 50.0 g of CaCO3 in 500.0 mL of solution. Solution “B” contains 6.0 moles of H2SO4 in 4.0 L of solution. SHOW WORK! ? mol CaCO3 = 50.0 g CaCO3 × “A”:
? L = 500.0 mL ×
“B”:
M=
1 mol CaCO3 = 0.500 mol CaCO3 100.0 g CaCO3
1L = 0.500 L 1000 mL
6.0 mol = 1.5 M 4.0 L
M=
0.500 mol = 1.00 M 0.500 L
“B” is more concentrated:
1.5 M
7. How many liters of solution can be produced from 2.5 moles of solute if a 2.0 M solution is needed? 2.0 M =
2.5 moles liters of solution
liters of solution = 1.25 L = 1.3 L
8. What would be the concentration of a solution formed when 1.00 g of NaCl are dissolved in water to make 100.0 mL of solution? ? mol = 1.00 g NaCl ×
