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WorksheetsSolutions CCA Review
Total questions: 12
Worksheet time: 16mins
Name
Class
Date
1.
If this beaker can hold a maximum amount of 3.0 g of solute, is this beaker saturated or supersaturated?
a)
supersaturated
b)
saturated
2.
Look at the graph below. In general, how does temperature affect solubility?
a)
As temperature decreases, solubility increases.
b)
As temperature increases, solubility increases.
c)
Solubility is not related to temperature.
d)
The solubility of a substance is determined by how fast the substances is stirred.
3.
Which compound is LEAST soluble at 10 °C?
a)
NaCl
b)
Ce₂(SO₄)₃
c)
KClO₃
d)
NH₃
4.
How many grams of KCl can be dissolved in 100g of water at 80°C?
a)
20g
b)
30g
c)
40g
d)
50g
5.
At 30°C, 90g of NaNO₃ is dissolved in 100g of water. Is this solution saturated or unsaturated?
a)
Yes, It is saturated.
b)
No, It is unsaturated.
6.
Which compound is the most soluble at 10°C?
a)
NaCl
b)
KCl
c)
KNO₃
d)
NaNO₃
7.
How much would remain undissolved if you added 120 g of KCl in 100 g of water at 80ºC
a)
70g
b)
10g
c)
90g
d)
30g
8.
How many moles of NaCl are needed to make 5.25 L of a 0.25 M solution?
a)
21 mol
b)
0.048 mol
c)
1.3 mol
9.
What is the molarity of a solution containing 4 moles of KCl in 2.5 L of solution?
a)
1.6 M
b)
0.63 M
c)
10 M
d)
2.6 M
10.
How many liters of a solution do you need to make a 10M solution with 23 moles of a solute?
a)
3.3 L
b)
2.3 L
c)
5 L
d)
76 L
11.
Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?
a)
The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together
b)
The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet
c)
The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface
d)
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
12.
Why does water move from the roots to the leaves of plants?
a)
Water is pushed by solutes
b)
Capillary action pulls the water molecules up like a chain
c)
Water is pulled by gravity
d)
Water cannot move up roots to leaves
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