
Molarity Problems
Authored by Lisa Thompson
Science
10th Grade

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the molarity of a solution made from 325.4g of AlCl3 with enough water to make 500.0 cm3?
4.88 g
4.88 M
2.440 M
2.44 M
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Calculate the molarity of a solution made of 308 grams of calcium nitrate, if it is dissolved in 7.32 liters of water.ANSWER WITH THREE SIG FIGS AND UNITS
Answer explanation
Use molar mass to convert from grams of calcium nitrate to moles of calcium nitrate (molar mass = 164.1 g/mol)
Units should be M
ANSWER WITH THREE SIG FIGS AND UNITS
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
How many moles of calcium chloride are needed to make up 2.45 L of a 0.450 M solution?
ANSWER WITH THREE SIG FIGS AND UNITS
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
How many moles of KHCO₃ are needed to make up 2,510 ml of 0.750 M solution? ANSWER WITH THREE SIG FIGS AND UNITS
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
We want 3.20 moles of solute dissolved in enough water to make a solution with a concentration of 0.150 M. What will the volume of the solution need be?
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
How many grams of solid NaOH are needed to make up 2.00 liters of a 0.500M aqueous solution of sodium hydroxide?
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
How many moles of solid CuCl₂ are needed to make up 15.00 liters of a 0.300 M aqueous solution of copper (II) chloride?
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