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Acids and Bases

Total questions: 51

Worksheet time: 38mins

Name
Class
Date
1.

A sour taste is a characteristic of:

a)

acids

b)

bases

c)

neutral

d)

pH scale

2.

Which is a characteristic of a base?

a)

tastes sour

b)

found mostly in foods

c)

feels slippery

d)

turn litmus paper red

3.

According to Bronsted-Lowry, what is the definition of an BASE?

a)

a substance that donates a hydrogen (H+) ion

b)

a substance that donates a hydroxide (OH-) ion

c)

a substance that accepts a hydrogen (H+) ion

d)

a substance that accepts a hydroxide (OH-) ion

4.

What is being donated/accepted between conjugate acid-base pairs?

a)

a hydrogen (H+) ion

b)

a hydroxide (OH-) ion

c)

water

d)

a neutron

5.

What is the conjugate base in the following reaction?

a)

HCO3-

b)

HCl

c)

H2CO3

d)

Cl-

6.
What is the conjugate acid in the following equation?
a)
PO43- 
b)
HNO3 
c)
NO3- 
d)
HPO42-
7.

Which of the following is an Arrhenius Acid?

a)

LiOH

b)

CO32-

c)

OH-

d)

H3PO4

8.
Which of the following shows the correct conjugate acid base pair?
a)
HCI (acid) / H3O+ (conjugate base)
b)
HCI (acid) / CI- (conjugate base)
c)
HCI (base) / CI- (conjugate acid)
d)
HCI (base) / H3O+ (conjugate acid)
9.
If a solution is basic which ion will be more present?
a)
H+
b)
K+
c)
OH-
d)
H-
10.

An arrhenius base

a)

produces hydroxide ions in a solution

b)

is a proton donor

c)

produces hydrogen ions in a solution

d)

is a proton acceptor

11.

A bronsted lowry acid

a)

produces hydroxide ions in a solution

b)

is a proton donor

c)

produces hydrogen ions in a solution

d)

is a proton acceptor

12.

Water can act as both an acid and a base according to the bronsted lowry model. This means water is

a)

neutral

b)

conjugate

c)

ionic

d)

amphoteric

13.

Identify the true statement about the following reaction:

F- + H2O --> HF +OH-

a)

H2O is a bronsted lowry base

b)

H2O is not an acid or base according to either model

c)

H2O is a bronsted lowry acid

d)

H2O is an arrhenius acid

14.

Acid-base conjugate pairs differ by a single

a)

Electron

b)

Proton

c)

Neutron

d)

Oxygen

15.

Which of the following show an acid and its conjugate base pair (in that order)

a)

H2SO4, SO42-

b)

OH-, H2O

c)

NH4+, H2O

d)

H2CO3, HCO3-

16.

Could C2H3O2- act as a base when placed in water?

a)

Yes, because it can accept a H+

b)

Yes, because it can donate a H+

c)

No, because it cannot donate a H+

d)

No, because it cannot accept a H+

17.
What is the conjugate acid in the following equation?
a)
PO43- 
b)
HNO3 
c)
NO3- 
d)
HPO42-
18.
What is the conjugate base in the following reaction?
a)
HCO3- 
b)
HCl
c)
 H2CO3 
d)

Cl-

19.

Which of the following correctly identifies an acid-base pair?

a)

HCl, NaOH

b)

H2CO3 , CO32-

c)

H3O+ , OH-

d)

NH4+, NH3

20.

Which of the following correctly identifies an Acid-Base Pair?

a)

HH4+ , OH-

b)

H2O , OH-

c)

CaCO3 ,CaCl2

d)

HNO3 , H2SO4

21.

What is NH4+ classified as?

a)

Acid

b)

Base

c)

Conjugate Acid

d)

Conjugate Base

22.

Which of the following word pairs correctly completes the sentence below? _______ are corrosive substances characterized as having a strong smell, a sour taste, and are able to give up a H+ ion.

a)

Acids

b)

Amphoteric Compound

c)

Bases

d)

Electrolyte

23.

Given the reaction above, which compound is the acid?

a)

NH3

b)

HCl

c)

NH4+

d)

Cl-

24.

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

a)

NH3

b)

NH4+

c)

Cl-

25.

The conjugate acid of HCO3- is ___ and the conjugate base of HCO3- is ___.

a)
H2CO3; CO3-2
b)
CO3-2; CO3-2
c)
H2CO3; H2O
d)
H2O; H2CO3
26.

Acids have a ______ pH and a _________ pOH

a)

low, high

b)

high, low

c)

An acid will not have a pOH

27.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
d)
1-20
28.
If the pH of a solution is 7 the solution is said to be
a)
Acidic
b)
Basic
c)
Neutral
d)
Tasty
29.

Which of these solutions is an acid?

a)

Dish Soap: pH of 12

b)

Tomato Soup: pH of 4

c)

Baking Soda: pH of 9

d)

Drain Cleaner: pH of 14

30.

Ammonia has a pOH of 2. Ammonia is __________.

a)

an acid

b)

a base

c)

an element

d)

a metal

31.

The picture below shows the relative concentrations of H+ and OH- in a solution. Is the solution an acid or a base?

a)

acid

b)

base

32.
A  pH and a pOH will add up to:
a)
0
b)
7
c)
14
d)
1.0 x 10-14
33.

A solution has a pH of 7.0. What would happen to the pH if OH- ions were added?

a)

pH would go up

b)

pH would go down

c)

pH would stay the same

d)

None of these

34.

If the [H+] of a solution is 1 x 10-2 M the pH is

a)

2

b)

12

c)

-2

d)

1

35.
If the pH of a solution is 5 the [H+] is
a)
1.0 x 105  M
b)
1.0 x 109  M
c)
5.0 x 101  M
d)
1.0 x 10-5  M
36.
If the pH of a solution is 5.6 the pOH is
a)
6.5
b)
12.4
c)
8.4
d)
5.6
37.

If the [H3O+] of a solution is 1 x 10-8 M the [OH-] is

a)

1.0 x 10-6 M

b)

1.0 x 106 M

c)

1.0 x 10-8 M

d)

1.0 x 108 M

38.
Limes have a [H3O+] of 1.3 x 10-2 mol/L.  Their pOH is
a)
1.89
b)
12.11
c)
1.03
d)
12.97
39.
if a solution has a pOH of 5.2 the [OH-] of the solution is
a)
6 x 10 -6 M
b)
6.3 x 10 -6 M
c)
1.58 x 10-5 M
d)
2 x 10-5 M
40.
if the [H+] of a solution is 8.4 x 10-3 mol/L the pOH of the solution will be
a)
2.08
b)
11.92
c)
1.02
d)
12.98
41.
A solution with a [H+] of 9.4 x 10-5 mol/L is said to be
a)
Acidic
b)
Basic
c)
Neutral
d)
negative number, no solution.
42.

What is the pOH of a 0.0124 M HCl solution?

a)

1.91

b)

12.09

c)

1.61

d)

12.39

43.

Find the pH of a solution that contains 4.17 g of H2SO4 dissolved in 1.75 liters of solution.

a)

1.31

b)

2.29

c)

3.45

d)

2.02

44.
Bases will turn litmus paper __________, while acids will turn litmus paper __________.
a)
blue.....red
b)
red.....blue
c)
pink.........colourless
d)
colourless..........pink
45.
According to the image, the substance tested is a...
a)
Acid
b)
Neutral
c)
Strong Acid
d)
Base
46.
According to the image, the substance tested is a...
a)
Acid
b)
Base
c)
Neutral
d)
Strong Acid
47.
One drawback of litmus paper is that it
a)
Only tells you if a substance is an acid or a base
b)
is very expensive
c)
is messy
d)
has to be connected to a computer
48.
How would you classify the substance being tested?
a)
Acid
b)
Base
c)
Both
d)
Neither
49.

Phenothalein when added to base

a)

remains colorless

b)

turns orange

c)

turns pink

d)

I don't know

50.

Which of the following will have the maximum concentration of H+ ions

a)

Solution with pH 4

b)

Solution of pH 2

c)

Solution of pH 10

d)

Solution of pH 7

51.

What is hydrangea

a)

an natural indicator

b)

an artificial indicator

c)

acid base indicator

d)

none of the above

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