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Unit 9 Test Review 2022

Total questions: 18

Worksheet time: 39mins

Name
Class
Date
1.

How many grams of K2Cr2O7, are soluble in 100 g of water at 95 ºC?

a)

83 grams

b)

75 grams

c)

40 grams

d)

12 grams

2.

Which substance is MOST soluble at 0 ºC?

a)

KI

b)

NaNO3

c)

NaCl

d)

Ce2(SO4)3

3.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
4.
When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
unsaturated
c)
saturated
5.

The _____ is the thing being dissolved.

a)

solute

b)

solvent

6.
How many moles of NaCl are present in a solution with a molarity of 8.59 M and a volume of 125 mL?
a)
1074 mol
b)
0.069 mol
c)
1.07 mol
d)
62.7 mol
7.

What is the molarity of 4 g of NaCl (MM=58.45) in 3.80 L of solution?

a)
0.018 M
b)
0.0011 M
c)
1.052 M
d)
0.062 M
8.

How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?

a)

27.8 mL

b)

.278 mL

c)

2.8 mL

d)

278 mL

9.
Colligative properties depend on the _____ of solute particles in solution.
a)
type
b)
number
c)
pH
d)
nature
10.
Strong acids and bases...
a)
do not break apart into ions (non-electrolyte)
b)
partially break apart into ions (weak electrolyte)
c)
completely break apart into ions (non-electrolyte)
d)
completely break apart into ions (strong electrolyte)
11.
The reaction of perchloric acid (HClO4) with lithium hydroxide (KOH) is described by the equation
HClO4 + KOH → KClO4 + H2O
Suppose 100 mL of perchloric acid is neutralized by exactly 50,0 mL of 1.0 M of Potassium hydroxide. What is the concentration of the perchloric acid?
a)
0.5M
b)
50M
c)
2.0M
d)
1.0M
12.

Which two describe an acid?

a)

pOH = 2

b)

[H+] = 1.0 x 10-4

c)

tastes sour

d)

turns red litmus paper blue

13.

pH = 11 [OH-] = ?

a)

11

b)

3

c)

1.0 x 10-3

d)

1.0 x 10-11

14.

Which of the following will dissolve in water?

a)

H2

b)

CO2

c)

CH4

d)

HF

15.

2SO2(g)+O2(g)⇌2SO3(g)

Removing O2(g) will

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase pressure

d)

have no change

16.

2SO2(g)+1O2(g) ⇌ 2SO3(g) + Heat


Increasing the pressure on the system will...

a)

shift equilibrium right

b)

shift equilibrium left

c)

slow rate of reaction

d)

have no change

17.

2SO2(g)+O2(g) ⇌ 2SO3(g) + Heat


Increasing the temperature will...

a)

shift equilibrium right

b)

shift equilibrium left

c)

increase pressure

d)

have no change

18.

Which solute is a gas? (It does not increase in solubility as temperature rises?

a)
NH3
b)
NaNO3
c)
KNO3
d)
NaCl

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