Log in
Sign up for FREE
arrow_back
Library
Copy of pH Calculations; Conj. Acids and Bases (5/28/2026)
By Jason Poe
star
star
star
star
star
Share
share
Last updated about 3 hours ago
15 questions
Add this activity
Note from the author:
Instructions
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
Use a scientific calculator and the pH = -log[H+] formula to solve for each pH.
Then identify if each solution is acidic, alkaline, or neutral.
Round each pH to the nearest tenth.
Use a scientific calculator and the pH = -log[H+] formula to solve for each pH.
Then identify if each solution is acidic, alkaline, or neutral.
Round each pH to the nearest tenth.
pH Calculations
You need to use a scientific calculator - it must have a "log" button.
pH = -log[H
+
]
Question 1
1.
What is the pH of a 1.0 x 10
-7
M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Question 2
2.
What is the pH of a 0.01 M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Question 3
3.
What is the pH of a 1.0x10
-2
M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Question 4
4.
What is the pH of a 1.0x10
-10
M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Question 5
5.
What is the pH of a 1.0 M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Question 6
6.
What is the pH of a 5.0x10
-5
M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Question 7
7.
What is the pH of a 1.0x10
-5
M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Question 8
8.
What is the pH of a 2.5x10
-3
M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Question 9
9.
What is the pH of a 2.0x10
-9
M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Question 10
10.
What is the pH of an 8.0x10
-9
M solution? Identify the solution — is it acidic, alkaline, or neutral?
pH _______
Type of solution _______
Identifying Conjugate Acids and Bases
Review your notes about the definition of acids, bases, conjugate acids, and conjugate bases.
Question 11
11.
Question 12
12.
Question 13
13.
Question 14
14.
Question 15
15.
Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:
HCl + NH
3
→ NH
4
+
+ Cl
–
Cl
–
HCl
NH
3
NH
4
+
Acid
Conjugate Acid
Base
Conjugate Base
Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:
H
2
SO
4
+ H
2
O → HSO
4
–
+ H
3
O
+
H
2
O
HSO
4
–
H
2
SO
4
H
3
O
+
Acid
Conjugate Acid
Base
Conjugate Base
Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:
HCl + NH
3
→ Cl
–
+ NH
4
+
NH
4
+
HCl
Cl
–
NH
3
Acid
Conjugate Acid
Base
Conjugate Base
Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:
H
2
O + H
2
CO
3
→ H
3
O
+
+ HCO
3
–
H
3
O
+
HCO
3
–
H
2
O
H
2
CO
3
Acid
Conjugate Acid
Base
Conjugate Base
Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:
KOH + HNO
3
→ KNO
3
+ H
2
O
KOH
HNO
3
KNO
3
H
2
O
Acid
Conjugate Acid
Base
Conjugate Base