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Copy of pH Calculations; Conj. Acids and Bases (5/28/2026)

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Identifying Conjugate Acids and Bases

  • Review your notes about the definition of acids, bases, conjugate acids, and conjugate bases.

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  1. Use a scientific calculator and the pH = -log[H+] formula to solve for each pH.

  2. Then identify if each solution is acidic, alkaline, or neutral.

  3. Round each pH to the nearest tenth.

  1. Use a scientific calculator and the pH = -log[H+] formula to solve for each pH.

  2. Then identify if each solution is acidic, alkaline, or neutral.

  3. 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+]

Otázka 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

Otázka 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

Otázka 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

Otázka 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

Otázka 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

Otázka 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

Otázka 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

Otázka 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

Otázka 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

Otázka 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

Otázka 11
11.

Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:

HCl + NH3 → NH4+ + Cl–

  • NH3

  • Cl–

  • NH4+

  • HCl

  • Acid

  • Conjugate Acid

  • Base

  • Conjugate Base

Otázka 12
12.

Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:

H2SO4 + H2O → HSO4– + H3O+

  • HSO4–

  • H2O

  • H2SO4

  • H3O+

  • Acid

  • Conjugate Acid

  • Base

  • Conjugate Base

Otázka 13
13.

Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:

HCl + NH3 → Cl– + NH4+

  • NH4+

  • HCl

  • NH3

  • Cl–

  • Acid

  • Conjugate Acid

  • Base

  • Conjugate Base

Otázka 14
14.

Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:

H2O + H2CO3 → H3O+ + HCO3–

  • H2CO3

  • HCO3–

  • H2O

  • H3O+

  • Acid

  • Conjugate Acid

  • Base

  • Conjugate Base

Otázka 15
15.

Identify the acid, base, conjugate acid, and conjugate base in the following balanced equation:

KOH + HNO3 → KNO3 + H2O

  • KNO3

  • H2O

  • KOH

  • HNO3

  • Acid

  • Conjugate Acid

  • Base

  • Conjugate Base