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EAS Chemistry Spring 2023 Final Exam Review

Total questions: 47

Worksheet time: 2hrs 23mins

Name
Class
Date
1.

What is the pOH of a substance that has a pH of 9?

Hint: pH + pOH = 14

a)

7

b)

4

c)

1

d)

5

2.

Which of the following is a property of a base?

a)

Sour taste

b)

pH above 7

c)

Forms H+ ions

d)

Feels sticky

3.

The substance that gets dissolved when forming a solution is the __________.

a)

solute

b)

solvent

4.

A strong acid ________ dissociate/ionize completely.

a)

will not

b)

will

5.

Which of the following is NOT a property of acids?

a)

Feels sticky

b)

pH below 7

c)

Bitter taste

d)

Form H+ ions

6.

Which type of solution contains more dissolved solute than it could under normal conditions?

a)

Saturated solution

b)

Supersaturated solution

c)

Unsaturated solution

7.

How many liters are in 3.55 moles of H2?

a)

22.4 L

b)

0.16 L

c)

6.31 L

d)

79.52 L

8.

To better dissolve a gas into solution, you must __________.

Hint: There are two correct answers

a)

increase pressure

b)

heat the solution

c)

cool the solution

d)

decrease pressure

9.

How many grams of H2O will be produced from 50.0 g Mg(OH)2?

2HBr + Mg(OH)2 →\rightarrow MgBr2 + 2H2O

a)

30.89 g H2O

b)

0.10 g H2O

c)

7.72 g H2O

d)

15.45 g H2O

10.

How many atoms are in 1.00 mole of Aluminum (Al)?

a)

22.4 atoms

b)

1.00 atoms

c)

26.98 atoms

d)

6.02 x 1023 atoms

11.

What is the molar mass of aluminum chloride, AlCl3?

a)

116.39 g/mol

b)

133.33 g/mol

c)

62.43 g/mol

d)

22.40 g/mol

12.

If a gas has a volume of 5.00 L at 50.0 °C, what is the volume when the temperature is raised to 75.0 °C?

a)

4.64 L

b)

7.50 L

c)

5.39 L

d)

3.33 L

13.

What is the percent composition of sodium (Na) in NaClO3?

a)

21.60%

b)

25.42%

c)

30.88%

d)

18.78%

14.

How many atoms are in 3.45 moles of magnesium (Mg)?

a)

2.08 x 1024 atoms

b)

1.74 x 1023 atoms

c)

5.73 x 10-24 atoms

d)

6.02 x 1023 atoms

15.

A student produced 24.35 g of a product in a lab experiment. Theoretically, they should have produced 26.00 g. What is the student's percent yield?

a)

6.35%

b)

24.73%

c)

54.88%

d)

93.65%

16.

What is the pressure of an ideal gas (in atm) if you contain 8.50 moles in a 10.0 L container at 25.0 °C?

a)

0.02 atm

b)

20.80 atm

c)

1.74 atm

d)

1.00 atm

17.

If you have 40 g of KCl at 50 °C, what type of solution do you have?

a)

Unsaturated solution

b)

Saturated solution

c)

Supersaturated solution

18.

At what temperature do CaCl2 and NaNO3 have the same solubility?

a)

50 °C

b)

25 °C

c)

30 °C

d)

70 °C

19.

A(n) ________ is a solution that contains more hydroxide ions (OH-) than hydrogen (H+) ions.

a)

base

b)

titration

c)

acid

d)

buffer

20.

Predict the products of the following acid-base (neutralization) reaction:

CsOH + H2SO4 →\rightarrow ???

a)

H3O+ + CsSO4

b)

H2O + CsSO4

c)

H3O+ + Cs2SO4

d)

H2O + Cs2SO4

21.

If the pressure of a gas decreases, what happens to the volume?

a)

It does not change

b)

It increases

c)

It decreases

22.

How many moles are in 3.75 L of O2?

a)

84.00 mol

b)

0.17 mol

c)

5.97 mol

d)

6.23 x 10-24 mol

23.

In a neutralization reaction, an acid and base react to form what two substances?

a)

buffer and indicator

b)

carbon dioxide and water

c)

salt and water

d)

electrolyte and solute

24.

2.35 moles of CaBr2 are dissolved in 0.50 L of water. What is the molarity of the solution?

a)

4.70 M

b)

1.18 M

c)

0.21 M

d)

0.30 M

25.

What volume of a highly concentrated 10.0 M stock solution of HF should be diluted in order to produce 5.00 L of 2.00 M HF?

a)

4.00 L

b)

1.00 L

c)

22.4 L

d)

25.0 L

26.

How many moles of NaOH are needed to make 5.00 L of a 0.50 M solution?

a)

0.10 moles

b)

10.0 moles

c)

2.50 moles

d)

1.00 moles

27.

If the temperature of a gas increases, what happens to the volume?

a)

It decreases

b)

It does not change

c)

It increases

28.

How many moles are in 3.00 g of aluminum chloride, AlCl3?

a)

1.00 moles

b)

0.02 moles

c)

44.44 moles

d)

3.00 moles

29.

What is the percent composition of lithium (Li) in Li2CO3?

a)

9.39%

b)

23.98%

c)

11.99%

d)

18.78%

30.

Calculate the molar mass of aluminum hydroxide, Al(OH)3

a)

43.99 g/mol

b)

78.01 g/mol

c)

46.01 g/mol

d)

62.01 g/mol

31.

At what temperature does 10 g of KClO3 reach saturation?

a)

10 °C

b)

30 °C

c)

80 °C

d)

18 °C

32.

A weak base ________ dissociate/ionize completely.

a)

will

b)

will not

33.

When forming a solution, the substance that does the dissolving is called the ________.

a)

solute

b)

gas

c)

solvent

34.

What would the pH most likely be after a neutralization reaction between a strong acid and a strong base?

a)

3

b)

0

c)

7

d)

10

35.

Why is water known as "The Universal Solvent"?

a)

It is used all over the universe

b)

It dissolves ALL substances

c)

It is a polar molecule that breaks apart ionic/polar compounds

d)

It easily combines with nonpolar molecules

36.

Which of the following is NOT a factor in the rate of dissolving?

a)

Agitation (stirring)

b)

Particle size (surface area)

c)

Temperature

d)

Density

37.

300 mL of a 2.00 M solution is diluted to 500 mL. What is the concentration of the new solution?

a)

0.10 M

b)

3.33 M

c)

0.63 M

d)

1.20 M

38.

Substances on the pH scale with a pH below 7 are ________.

a)

acids

b)

neutral

c)

bases

39.

If the pressure of a gas decreases, what happens to the temperature?

a)

It does not change

b)

It decreases

c)

It increases

40.

How many grams are in 3.50 moles of potassium hydroxide, KOH?

a)

0.06 g

b)

196.39 g

c)

16.03 g

d)

56.11 g

41.

How many moles are in 9.03 x 1023 molecules?

a)

0.67 moles

b)

1.50 moles

c)

5.44 x 1047 moles

d)

1.00 moles

42.

A 7.50 L container of hydrogen has a pressure of 5.50 atm. What volume would be necessary to decrease the pressure to 2.50 atm?

a)

16.50 L

b)

1.83 L

c)

103.13 L

d)

3.41 L

43.

What is the [OH-] concentration if the pOH is 13.5?

Hint: [OH-] = 10-pOH

a)

0.01 M

b)

3.16 x 1013 M

c)

1.13 M

d)

3.16 x 10-14 M

44.

In a(n) ________ solution, the maximum amount of solute has been dissolved.

a)

saturated

b)

unsaturated

c)

supersaturated

45.

In a(n) ________ solution, more solute is capable of being dissolved.

a)

supersaturated

b)

unsaturated

c)

saturated

46.

What is the molar mass of aluminum sulfate, Al2(SO4)3?

a)

198.02 g/mol

b)

342.14 g/mol

c)

262.14 g/mol

d)

278.02 g/mol

47.

What is the new pressure of a gas when 3.0 atm is heated from 0 ⁰C to 100 ⁰C?

a)

3.39 x 104 atm

b)

3.00 atm

c)

1.00 atm

d)

4.10 atm

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