# PRACTICE QUESTIONS ON pH AND pOH CALCULATIONS

CHOOSE THE CORRECT OPTIONS IN THE QUESTIONS BELOW.

QUESTION 1.

The range of values in a standard pH scale is...?

(A). 0 to 1

(B). 1 to 14

(C). 0 to 14

(D). 1 to 7

QUESTION 2.

A solution that resists change in its pH value when a very little quantity of an acid or a base is added to it is known as .....?

(A). Buffer acid

(B). Supersaturated solution

(C). Saturated solution

(D). Buffer solution.

QUESTION 3.

The expected pH value for a neutral solution is.....?

(A). 0

(B). 7

(C). 1

(D). 14

QUESTION 4.

Which of the following is the mathematical expression for pH of a solution?

(A). pH = –log [OH]

(B). pH = log [H^+]

(C). pH = log 1/[H^+]

(D). pH = – log 1/[H^+]

QUESTION  5.

Calculate the pH of a solution of H2SO4 whose concentration is 0.005M.

(A). 1

(B). 3

(C). 2

(D). none

QUESTION 6.

What is the pH of a solution of Can(OH)2 solution given that molarity of the solution is 0.0005M.

(A). 3

(B). 13

(C). 11

(D). none

QUESTION 7.

Calculate the pOH value of HCl acid solution which contains 14.6g of the acid in 40dm³ of solution.

(A). 1

(B). 13

(C). 2

(D). none

QUESTION 8.

Find the ionization constant value of a solution whose base ionization constant is 1.0x10^–¹²

(A). 1.0x10²

(B). 1.0x10^–³

(C). 1.0x10³

(D). 1.0x10^–²

QUESTION 9.

Calculate the of a buffer solution prepared by adding 3.2g of sodium ethanoate to 1dm³ of a 0.01mol/dm³ of ethanoic acid whose Ka value is 1.82x10^–5.

(A). 5.34

(B). 0.534

(C). 4.35

(D). 3.45

QUESTION 10.

Find the hydrogen ion concentration of an acid whose pH value is 1.89

(A). 0.3

(B). 0.003

(C). 0.13

(D). 0.013

Good luck.
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May 26, 2020 2:28 pm

Josh_S
1. C
2. D
3. D
4. C
5. C
6. A
7. C
8.
9.
10. D

May 26, 2020 2:27 pm

1. C
2. D
3. D
4. C
5. C
6. A
7. C
8.
9.
10. D

May 26, 2020 1:58 pm

From Benitha
1)c
2)d
3)b
4)c
5)c
6)c
7)d
8)d
9)a
10)d

May 26, 2020 12:21 pm

Blessed
1 C
2 D
3 B
4 C
5 C
6 C
7 D
8 D
9 A
10 C

May 26, 2020 6:23 am

Marycynthia
1 C
2 D
3 B
4 C
5 C
6 A
7 C
8 D
9 A
10 A

May 25, 2020 11:53 pm

1)C
2)A
3) B
4)C
5)C
6)A
7)C
8)B
9)C
10)D

May 25, 2020 9:38 pm

1. C
2. C
3. B
4. C
5. C
6. A
7. D
8. D
9. A
10. D

May 25, 2020 5:26 pm

1)B
2)D
3)B
4)D
5)C
6)C
7)C
8)D
9)A
10)D

Precious Chima

May 25, 2020 5:19 pm

1c
2d
3b
4a
5 c
6a
7b
8 a
9 b
10a

May 25, 2020 4:01 pm

4. C

May 25, 2020 3:51 pm

Name is Ann
1. C
2. D
3. B
4. Nil
5. C
6. C
7. D
8. 🤔
9. 🤔
10. D

Emmanuel okoro
May 28, 2020 3:13 am

Emmanuel o.
A
D
B
D
A
C
B
D
C
A

May 26, 2020 5:39 pm

I will submit my answer next week.

May 26, 2020 9:11 pm

Isaac
May 26, 2020 11:21 pm

1c
2d
3b
4c
5c
6c
7d
8d
9a
10d

Favour Ihezie
May 27, 2020 12:49 pm

1 D
2 B
3 B
4 A
5 C
6 A
7 C
8 A
9 D
10 A

Precious Chinaza
May 27, 2020 4:03 pm

1.C
2.D
3.B
4.ph=-log[H^+]
5.C
6.A
7.D
8.D
9.A
10.D

May 28, 2020 1:32 am

Jodie
1.C
2.D
3.B
4.C
5.C
6.C
7.B
8.D
9.
10.A

Nnanna Peace
May 28, 2020 6:22 am

1. C
2. D
3. B
4. D
5. C
6.A
7. C
8. D
9. A
10. D

Onuwabueze marvelous
May 28, 2020 7:34 am

Marvelous
1 a
2 b
3 b
4 c
5 c
6 c
7 b
8 d
9 a
10 d

Onyi
May 28, 2020 1:16 pm

Onyi
1. C
2. D
3. B
4. C
5. D
6. D
7. No idea
8. No idea
9. No idea
10. D

Heymeka
May 28, 2020 9:44 pm

1. C
2. D
3. B
4. C
5. C
6. A
7. C
8. D
9. A
10. D

Rutzy
May 28, 2020 9:58 pm

1.c
2.d
3.b
4.c
5.c
6.c
7.d
8.a
9.a
10.d

THE CATALYST
June 13, 2020 10:58 am

seen

May 28, 2020 10:02 pm

1. C
2. D
3. B
4. B
5. C
6. C
7. D
8. D
9. A
10. D

Emmanoovic
May 29, 2020 10:01 am

1.C
2.A
3.B
4.C
5.C
6.A
7.B
8.B
9.C
10.D

Emmanoovic
May 29, 2020 10:02 am

2.D

May 29, 2020 10:56 am

Jodie
1.C
2.D
3.B
4.C
5.C
6.C
7.B
8.D
9.B
10.A

May 29, 2020 12:09 pm

Déràsín
1.C
2.D
3.B
4.C
5.C
6.A
7.A
8.D
9.🤔
10.D

Okoro Sixtus emedaobi
August 6, 2020 3:33 pm

Lol..wetin u day think 4 no 9

Ngozi
May 29, 2020 12:20 pm

1.C
2.D
3.B
4.C
5.C
6.A
7.B
8.A
9.A
10.D

May 29, 2020 2:45 pm

Ugochukwu

May 29, 2020 2:52 pm

1)B
2)D
3)B
4)D
5)C
6)C
7)C
8)D
9)A
10)D

May 29, 2020 3:04 pm

1. C
2. B
3. B
4. C
5. C
6. C
7. D
8. D
9. C
10. A

Mevia Iheanacho
May 29, 2020 4:58 pm

1. B
2. D
3. B
4. C
5. C
6. C
7. B
8. D
9. D
10. D

Mevia Iheanacho

June 13, 2020 7:14 am

Awesome point! 👏

May 29, 2020 5:55 pm

1:C
2:D
3:B
4:C
5:C
6:C
7:D
8: D
9: A
10:A

May 29, 2020 8:06 pm

1c
2d
3b
4d
5c
6a
7c
8d
9b
10b

Benitha
May 29, 2020 9:49 pm

1C
2D
3B
4C
5C

6A
7C
8B
9
10D

Orisakwe Emmanuel
May 31, 2020 6:35 am

Orisakwe Emmanuel
1)C
2)D
3)B
4)C
5)C
6)C
7)D
8)D
9)A
10)D

May 31, 2020 7:05 pm

Xandra
1:C
2:D
3:B
4:C
5:C
6:C
7:D
8: D
9: A
10:A

Onyeokoro chiamaka Stephanie
May 31, 2020 7:24 pm

1. C
2. D
3. B
4. A
5. C
6. A
7. D
8. D
9. A
10. A

Emmanuel
June 2, 2020 5:00 am

1 C
2 D
3 B
4 C
5 C
6 C
7 B
8 D
9 nil
10 nil

CATALYST
June 5, 2020 7:55 am

Good

THE CATALYST
June 5, 2020 9:39 am

Good

June 13, 2020 7:12 am

This is beautiful!

Obi ifunanya
June 19, 2020 11:02 pm

1. C
2. D
3. B
4. C
5. C
6. C
7. D
8. D
9. A
10. D

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