Answers25-26 KCS18 Chemistry ICTest

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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.
2
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of solute per volume of solvent

A
increases.
B
decreases.
C
remains the same.
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
saturated
B
supersaturated
C
unsaturated
4

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
5

A science teacher adds water to a strong acid for use in the lab with students. This makes the concentration , because the amount

A
weaker
B
stronger
C
the same
6

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
7

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
8

Which setup is correct for finding moles?

A
Option
Option A
B
Option
Option B
9

Which setup is correct to find liters?

A
Option
Option A
B
Option
Option B
10

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.
11

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.
12

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
13

3. What happened to the color of the solution as you added more of the ionic compound?

A
It got darker.
B
It got lighter.
C
It stayed the same.
14

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.
15

Which equation should you use to find the final concentration?

A
Option
Option A
B
Option
Option B
C
Option
Option C
16

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.

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