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Worksheets

Acids and Bases

Total questions: 50

Worksheet time: 1hrs 8mins

Name
Class
Date
1.

Which pH represents the solution with the highest Hydrogen ion concentration

a)

pH=1

b)

pH=3

c)

pH=7

d)

pH=11

2.

Which compound represents an acid?

a)

NaOH

b)

HCl 

c)

CH2OH

d)

NaCl

3.

Which compound represents an base?

a)

NaOH

b)

HCl 

c)

CH2OH

d)

NaCl

4.
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
a)
strongly acidic
b)
slightly acidic
c)
strongly basic
d)
slightly basic
5.

A sugar solution has a pH of 7. This means the sugar solution is:

a)

acidic

b)

basic

c)

neutral

6.

Which of these is a property of acidic solutions?

a)

they taste sour

b)

they feel slippery

c)

they are in many cleaning products

d)

they taste bitter

7.

An unknown substance was tested and found to have an extremely high concentration of hydroxide ions, OH-. and very low concentration of hydronium ions, H3O+. Which pH would make the most sense?

a)

pH = 2

b)

pH = 6

c)

pH = 8

d)

pH = 12

8.

What is the fomula of carbonic acid?

a)

H2CO3

b)

H2CrO4

c)

H2C2O4

d)

HCO3

9.

What is the formula of chlorous acid?

a)

HClO3

b)

HClO2

c)

HClO

d)

HCl

10.

The name of the acid with the formula HF is ____.

a)

flouric acid

b)

hydrofluoric acid

c)

fluorate acid

d)

hydrogen fluoridic acid

11.

The table shows the pH of several solutions. Which solution has the greatest concentration (amount) of H+ ions?

a)

vinegar

b)

milk

c)

water

d)

bleach

12.

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

13.
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.
14.

What is the pH of a solution where the [H+] is 1.0 x 10-11?

a)

11

b)

13

c)

14

d)

1

15.

What is the pOH of a 1 x 10-8 M solution of HNO3?

a)

8

b)

6

c)

7

d)

9

16.

What is the [H+] if the pH is 4.0?

a)

1.0 x 10-10 M

b)

1.0 x 10-4 M

c)

1.0 x 10-14 M

d)

1.0 x 10-7 M

17.
What is the pOH of a solution that has a pH of 2?
a)
10
b)
12
c)
14
d)
1
18.

Which of the following are properties of acids but not bases? Select all that apply.

a)

Changes the color of an indicator

b)

Sour taste

c)

Reacts with metals to produce hydrogen gas

d)

Feels slippery

19.

Neutralization is the process of an acid and a base reacting to form what? Select all that apply

a)

An ionic salt

b)

Hydronium ions

c)

NaCl

d)

Water

20.

What is the formula for nitrous acid?

a)

HNO2

b)

H3N

c)

HNO3

d)

HNO

21.

An arrhenius 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

22.

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

23.

A bronsted lowry 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

24.

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

25.

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

26.

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

27.

Choose the correct statements about HI based on the following reaction (select all that apply):

HI + H2O --> I- + H3O+

a)

HI is an arrhenius acid

b)

HI is an arrhenius base

c)

HI is a bronsted lowry acid

d)

HI is a bronsted lowry base

28.

Acid-base conjugate pairs differ by a single

a)

Electron

b)

Proton

c)

Neutron

d)

Oxygen

29.

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-

30.

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+

31.

In the following chemical equation, which compound is the base?


HCl + NH3 → NH4+ + Cl−

a)

HCl

b)

NH3

c)

NH4+

d)

Cl−

32.

HSO4-(aq) + H2O(l) → H3O+(aq) + SO42-(aq)

Identify the Brønsted-Lowry acid in the above reaction.

a)

HSO4-

b)

H2O

c)

H3O+

d)

SO42-

33.

A substance that remains when a base has accepted an H+ ion is a(n)


(a)  
Choose from the below words
conjugate acid
acid
base
conjugate base
34.

Choose the conjugate acid of OH-

a)

HCO3-

b)

OH-

c)

CO32-

d)

H2O

35.

Choose the conjugate base of HNO3

a)

HNO3

b)

H2O

c)

H3O+

d)

NO3-

36.

True or False: All Arrhenius acids are also Brønsted-Lowry acids.

a)

True

b)

False

37.

Which of the following substances is both a Brønsted-Lowry base and an Arrhenius base?

a)

NH3(aq)

b)

LiOH(aq)

c)

HCl(g)

d)

HCl(aq)

38.

The conjugate acid for NH3 is

a)

NH2

b)

N

c)

H3

d)

NH4+

39.

Match these

a)

strongly acidic

1.

3.3 mountain dew

b)

slightly acidic

2.

6.7 milk

c)

strongly basic (alkaline)

3.

13 ammonia

d)

slightly basic (alkaline)

4.

7.35 human blood

40.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
41.
What might happen if you mixed a strong acid with an equally strong base?
a)
You would see an explosive chemical reaction.
b)
The acid would destroy the base.
c)
The base would destroy the acid.
d)
You'd wind up with a pH-neutral substance.
42.

For a solution, pH + pOH =

a)

7

b)

14

c)

1.0 x 10-14

d)

-log (1.0 x 10 -14)

43.

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

44.

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

45.

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

46.

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

47.

NaOH is a strong base. If 3.0 mol NaOH is added to 1 L of water, the hydroxide ion concentration will be

a)

less than 3 M

b)

3 M

c)

more than 3 M

48.

HF is a weak acid. If 2 mol of HF is added to 1 liter of water the concentration of [H+] will be

a)

more than 2 M

b)

2 M

c)

less than 2M

49.

Which of the following is a binary acid?

a)

H2SO4

b)

HNO3

c)

H2Se

d)

HC2H3O2

50.

Choose the correct statements about HI based on the following reaction (select all that apply):

HI + H2O --> I- + H3O+

a)

HI is an arrhenius acid

b)

HI is an arrhenius base

c)

HI is a bronsted lowry acid

d)

HI is a bronsted lowry base

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