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2025 Unit 15 Acids and Bases Review

Total questions: 71

Worksheet time: 51mins

Name
Class
Date
1.

Which of the following is the strongest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

2.

Which of the following is the weakest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

3.

Which of the following is the strongest acid?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

4.

Which of the following is the strongest base?

a)

soap - 10

b)

HCL - 0

c)

blood - 7.45

d)

soft drink - 3

5.

Which of the following is the strongest acid?

a)

soap - 10

b)

HCL - 0

c)

blood - 7.45

d)

soft drink - 3

6.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

7.

Milk is a very weak acid. What might its pH value be?

a)

6.5

b)

7.8

c)

4.2

d)

12.2

8.

When an acid is dissolved in water, it turns red litmus paper blue.

a)

True

b)

False

9.

Bases turn blue litmus paper red.

a)

True

b)

False

10.

If the substance is neutral, what would the pH be?11

a)

3

b)

5

c)

7

d)

9

e)

11

11.
Which statement is true when acids and bases are mixed together?
a)
acids become stronger
b)
bases become stronger
c)
there is no change
d)
they neutralize each other
12.
What is the pH of water?
a)
0
b)
4
c)
7
d)
14
13.
Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution.  If you test a base with litmus paper, it will turn ____________.
a)
purple
b)
red
c)
blue
d)
pink
14.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
15.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
16.

What is the conjugate acid to NO3- ?

a)

HNO3

b)

H+

c)

OH-

d)

NO3-2

17.

The conjugate base of H2SO4 is:

a)

SO4-2

b)

HSO4+1

c)

H3SO4+1

d)

HSO4-1

18.

Which of the following represents a correct Brønsted-Lowry acid-conjugate base pair?

a)

H3O and H2O

b)

SO32- and SO2

c)

CO32- and CO

d)

HCO3- and CO32-

19.

Which of the following is an acid/conjugate base pair? (Choose all that apply.)

a)

HCl/OCl-

b)

NH4+/NH3

c)

H2SO4/SO42-

d)

H3O+/OH-

20.

Chose the correct acid-conjugate base pairs: (Choose all that apply.)

a)

HCl / Cl-

b)

H2O / OH-

c)

HCl / H2Cl

d)

H2O / H3O+

21.

Which compound is the conjugate acid?

PO43- + HNO3 ==> NO3- + HPO42-

a)

PO43-

b)

NO3-

c)

HNO3

d)

HPO42-

22.

In the reaction below, H2O is a(n):

H2SO3 + H2O --> H3O+ + HSO3-

a)

base

b)

acid

c)

conjugate base

d)

conjugate acid

23.

HSO4- + H2O → H3O++ SO42-

Identify the Acid in the above reaction.

a)

HSO4-

b)

H3O+

c)

H2O

d)

SO42-

24.

CO32-(aq)+H2O(l) → HCO3-(aq)+OH-(aq)

In the above reaction, which compound is the conjugate base?

a)

CO32-

b)

HCO3-

c)

H2O

d)

OH-

25.

In the reaction below, H2SO3 is a(n):

H2SO3 + H2O --> H3O+ + HSO3-

a)

base

b)

acid

c)

conjugate base

d)

conjugate acid

26.

In the reaction HCl + H2O --> H3O+ + Cl-, what is the conjugate acid?

a)

HCl

b)

H3O+

c)

H2O

d)

Cl-

27.

In this reaction...

CH3NH2 + H2O --> CH3NH3+ + OH-

CH3NH2 can be classified as which of the following?

a)

A Brønsted-Lowry base

b)

A Lewis acid

c)

A Brønsted-Lowry acid

d)

An Arrhenius acid

28.

HSO4- + H2O → H3O++ SO42-

Identify the Conjugate acid in the above reaction.

a)

HSO4-

b)

H3O+

c)

H2O

d)

SO42-

29.

NH3 + H2O --> NH4+ + OH-

What is the conjugate acid in the equation above?

a)

NH3

b)

NH4+

c)

H2O

d)

OH-

30.

NH3 + H2O --> NH4+ + OH-

What is H2O in this reaction?

a)

acid

b)

conjugate acid

c)

base

d)

conjugate base

31.

OH- + HPO4-2 --> H2O + PO4-3

What is the conjugate base?

a)

OH-

b)

H2O

c)

HPO4-2

d)

PO4-3

32.

OH- + HPO4-2 --> H2O + PO4-3

What is the acid?

a)

OH-

b)

H2O

c)

HPO4-2

d)

PO4-3

33.

OH- + HPO4-2 --> H2O + PO4-3

What is the conjugate acid?

a)

OH-

b)

H2O

c)

HPO4-2

d)

PO4-3

34.

Which of the following is the conjugate acid of HCO3-1?

a)

H2CO3

b)

H2CO3-1

c)

CO3-2

d)

CO3-1

35.

In the equation below, what is the conjugate base?

HBr + H2O ↔ Br- + H3O+

a)

HBr

b)

Br-

c)

H2O

d)

H3O+

36.

For a solution at 25oC, pH + pOH =

a)

7

b)

14

c)

1.0 x 10-14

d)

-log (1.0 x 10 -14)

37.

If the pH of a solution is 4.0, what is the pOH?

a)

4.0

b)

10.0

c)

1.0 x 10 -4

d)

cannot be determined from the information

38.

If the [H3O+] of a solution is 1 x 10-3 M, the pH is

a)

11

b)

-3

c)

3

d)

1

39.

If the pH of a solution is 8 the [H3O+] is

a)

1.0 x 106 M

b)

8.0 x 101 M

c)

1.0 x 108 M

d)

1.0 x 10-8 M

40.

When the hydrogen ion concentration goes up, the pH ___

a)

gets lower

b)

stays the same

c)

gets higher

d)

goes toward 7

41.

If the [OH-] of a solution is 2.7 x 10-4 M, the pOH of the solution is

a)

10.44

b)

1.00

c)

3.57

d)

-4.43

42.

The pH of a solution is 8.43. What is the [H3O+] concentration?

a)

3.7 x 10 -9

b)

1.0 x 10-8.43

c)

2.7 x 10-6

d)

1.0 x 10-14

43.

What is the numerical value of Kw, the water dissociation constant?

a)

14.0 x 10-1

b)

7.0 x 10-2

c)

2.0 x 10-7

d)

1.0 x 10-14

44.

If a solution has a pOH of 1 what is the pH? Is it an acid or base? (pick 2)

a)

acid

b)

base

c)

13

d)

1

e)

neutral

45.

If the [H3O+] of a solution is 6.8 x 10-8 M, the pH is

a)

7.17

b)

3.2 x 10-5

c)

7.2

d)

7.62

46.

If the [H3O+] of a solution is 9.3 x 10-3 M, the pOH of the solution will be

a)

2.03

b)

1.02

c)

11.97

d)

12.98

47.

When a water molecule loses a hydrogen ion, or proton, it becomes ___

a)

a hydronium ion, H3O+

b)

a hydroxide ion, OH-

c)

a hydronium ion, OH-

d)

a hydroxide ion, H3O+

48.

If a solution has a pH of 1 what is the pOH? Is it an acid or base? (pick 2)

a)

acid

b)

base

c)

13

d)

15

e)

neutral

49.

If a solution has a pOH of 3.7, the [OH-] of the solution is

a)

5.0 x 10-11

b)

2.0 x 10-4

c)

10.3

d)

14

50.

When a hydrogen ion, or proton, attaches to a water molecule it forms ___

a)

a hydronium ion, H3O+

b)

a hydroxide ion, OH-

c)

a hydronium ion, OH-

d)

a hydroxide ion, H3O+

51.

Oranges have a [H3O+] of 1.7 x 10-2 M. Their pOH is

a)

1.77

b)

12.23

c)

10.91

d)

3.09

52.

Find the pH of a solution with [OH-] = 8.41 x 10-4.

a)

3.08

b)

10.92

c)

9.88

d)

11.23

53.

What is the pOH of a solution where the [OH-] is 7.3 x 10-2 M?

a)

-1.14

b)

1.14

c)

2.01

d)

11.99

54.

A solution of KOH is 2.5 x 10-5 M. What is the [H+] concentration? (Hint: Find pOH, then pH, then [H+].)

a)

4.60

b)

9.40

c)

3.98 x 10-10

d)

1.0 x 10-4.60

55.
If the pH of a solution is 5.6 the pOH is
a)
6.5
b)
12.4
c)
8.4
d)
5.6
56.

What is this piece of apparatus called (a)  

Choose from the below words
Pipette
Burette
Janette
Cuvette
57.

Calculate the average volume of acid needed for this neutralisation

a)

15.2cm3

b)

15.0cm3

c)

35.5cm3

d)

30.1cm3

58.

30mL of NaOH is neutralized by 12.3mL of 0.2M HCl. What is the concentration of the NaOH.

a)

82 mol/l

b)

0.82 mol/l

c)

0.49 mol/l

d)

0.082 mol/l

59.

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

60.

If it takes 50 mL of 0.5 M Ca(OH)2 to neutralize 125 mL of hydrochloric acid (HCl), what is the concentration of the acid?

a)

0.2 M

b)

5 M

c)

0.5 M

d)

0.4 M

61.
Acid + Base ₋--> 
a)
salt + hydrogen
b)
salt + water
c)
salt + carbon dioxide + water
d)
salt
62.
HCl + NaOH → 
a)
NaH + ClOH
b)
NaCl + H2
c)
NaCl + H2O
d)
NaCl + Cl2
63.
What indicator is commonly used in titrations?
a)
Phenolphthalein
b)
Bromothymol Blue 
c)
Litmus
d)
Universal 
64.

What is the white tile or white paper for in titration?

a)

To help clearly see the color change

b)

To protect the conical flask

c)

To add extra height

d)

To assist the reaction

65.
what is the reading on this burette?
a)
4.40mL
b)
3.50mL
c)
3.60mL
d)
4.50mL
66.
What does pH measure?
a)
Amount of Oxygen Ions
b)
Amount of Hydrogen Ions
c)
The amount of salt in a solution
d)
The density
67.
If phenolphthalein turns bright pink, it indicates
a)
an acid 
b)
a base
c)
a neutral
68.
Forms hydroxide ions in water
a)
Acids
b)
Bases
c)
All
69.

What is the salt produced in the reaction

a)

potassium hydroxide

b)

potassium sulfate

c)

sulphuric acid

d)

sodium chloride

70.

What is the endpoint

a)

When the indicator is added

b)

When neutralization occurs

c)

When the standard solution is prepare

71.

A salt is made from..

a)

anion of the acid and cation of the base

b)

cation of the acid and anion of the base

c)

anion of the acid and cation of the acid

d)

anion of the base and cation of the base

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