Answers26-27 CFISD TX-Chemistry A CRMeasures of Concentration: Molarity

Measures of Concentration: Molarity Answers

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1
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How many moles of AgNO3 are present in 1.50 L of a 0.050 M solution?

A
1.50 mol
B
0.050 mol
C
0.075 mol
2
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Which equation should you use to find the final concentration?

A
Option
B
Option
C
Option
3

4. Tap the faucet to add another 0.5 L of water, bringing the total volume of the solution. When you doubled the water volume, what happened to the concentration? How would you now classify this solution?

A
It halved.
B
It doubled.
C
It stayed the same.
4

4. Tap the faucet to add another 0.5 L of water, bringing the total volume of the solution. When you doubled the water volume, what happened to the concentration? How would you now classify this solution?

A
saturated
B
supersaturated
C
unsaturated
5

Which equation shows the proper setup to find the volume of a 0.250 M CaCl2 solution that contains 39.5 g of CaCl2?

A
Option
B
Option
C
Option
6

Which methods could be used to dilute a solution of sodium chloride (NaCl)? Select all that apply.

A
Add more NaCl to the solution.
B
Add more water to the solution.
C
Remove a small amount of the solution and mix it with water.
D
Heat the solution to evaporate some of the water.
7

A chemical supply company sells sulfuric acid (H2SO4) in a concentration of 4.00 M. What volume of this solution would you need to make 12.0 mL of a 0.50 M H2SO4 solution?Which equation should you use?

A
Option
B
Option
C
Option
8

Every morning, Sarah prepares the same amount of coffee at the same temperature. Identify the coffee solution with the highest concentration.

A
On Wednesday, Sarah poured sugar into her coffee until the sugar molecules were spread evenly throughout the entire cup of coffee.
B
On Thursday, Sarah poured sugar into her coffee until undissolved sugar remained at the bottom of her coffee cup.
9

2. Move the shaker continuously to add cobalt (II) chloride until the concentration is 4.330 mol/L. How would you classify this solution?

A
saturated
B
supersaturated
C
unsaturated
10

What is the molarity of a solution that contains 25 g of HCl in 150 mL of solution? (The molar mass of HCl is 36.46 g/mol.)What should you find first?

A
moles
B
grams of solvent
C
liters of solute
11

The correct dimensional analysis equation is shown here:Did you perform the calculation correctly?

Question illustration
A
Yes, I got the correct answer.
B
Yes, but I got the wrong answer because of a math error.
C
No, I did not set up the calculation correctly.
12

Every morning, Sarah prepares the same amount of coffee at the same temperature. Identify the coffee solution with the highest concentration.

A
On Wednesday, Sarah poured sugar into her coffee until the sugar molecules were spread evenly throughout the entire cup of coffee.
B
On Thursday, Sarah poured sugar into her coffee until undissolved sugar remained at the bottom of her coffee cup.
13

Every Sunday, Sarah prepares blue fruit punch to have with dinner. Identify the fruit punch solution with the higher concentration.

A
fruit punch with a very dark blue color
B
fruit punch with a light blue color
14

What is the molarity of a solution that contains 25 g of HCl in 150 mL of solution? (The molar mass of HCl is 36.46 g/mol.)What should you find first?

A
moles
B
grams of solvent
C
liters of solute
15

Which setup is correct to find liters?

A
Option
Option A
B
Option
Option B
16

How many moles of AgNO3 are present in 1.50 L of a 0.050 M solution?

A
1.50 mol
B
0.050 mol
C
0.075 mol
17

Which equation shows the proper setup to find the volume of a 0.250 M CaCl2 solution that contains 39.5 g of CaCl2?

A
Option
Option A
B
Option
Option B
C
Option
Option C
18

A chemical supply company sells sulfuric acid (H2SO4) in a concentration of 4.00 M. What volume of this solution would you need to make 12.0 mL of a 0.50 M H2SO4 solution?Which equation should you use?

A
Option
Option A
B
Option
Option B
C
Option
Option C
19

Which statement best explains how the solution should be made?

A
Add 1.5 mL of 0.50 M H2SO4 to 10.5 mL of water to get 12 mL of 4 M H2SO4.
B
Add 1.5 mL of 4.00 M H2SO4 to 10.5 mL of water to get 12 mL of 0.50 M H2SO4.
C
Add 1.5 mL of 4.00 M H2SO4 to 12 mL of water to get 0.50 M H2SO4.
20

Every Sunday, Sarah prepares blue fruit punch to have with dinner. Identify the fruit punch solution with the higher concentration.

A
fruit punch with a very dark blue color
B
fruit punch with a light blue color

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