M9L3 Assignment- Concentration 2023
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Module 9 Lesson 3 Assignment: Concentration
Directions
:
Use what you have learned about molarity, molality, mass percent, and mole
fraction to solve the following problems. Be sure to show your work and circle or
highlight your answer. Please submit your work via the link provided.
1.
Calculate the molarity of 1.7
0 moles NaHCO
3
in 12
00. mL of solution.
2.
What mass of calcium
hydroxide, Ca
(OH)
2
is needed to make 5.2 liters of a 0.35
M
cobalt III hydroxide solution?
3.
What volume of barium chloride, BaCl
2
is needed to make a 5.2
M barium chloride
solution with 0.32
mol BaCl
2
?
4.
Calculate the molarity of 70.1 grams of sugar, C
12
H
22
O
11
in 750. mL of solution.
5.
To make a 5.25
M solution, how many moles of solute will be needed if 17
.0 liters of
solution are required?
6.
How many grams of potassium nitrate, KNO
3
are required to prepare 0.4
50 L of a
0.65
0 M solution?
7.
A solution is prepared by mixing 3
00.0 g of water, H
2
O, and 2
00.0 g of ethanol,
C
2
H
5
OH. Determine the mole fractions of each substance.
8.
Calculate the molality of 37
grams of KBr dissolved in 95
0.0 mL pure water.
9.
What mass of ammonium sulfate, (NH
4
)
2
SO
4
must be added to prepare 15
0.0 g of a
2
.5% solution of ammonium sulfate in water?
10.
Determine the moles of solute in a 1
50g solution that is 1.3
molal.
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