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Redox Reactions Balancing Worksheet, Lecture notes of Chemistry

University of Southern Philippines Foundation (USPF)Chemistry

A balancing redox reactions worksheet for both acid and basic solutions. It includes various redox reactions and their corresponding answers.

Typology: Lecture notes

2021/2022

Uploaded on 08/01/2022

hal_s95
hal_s95 🇵🇭

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BalancingRedoxReactionsWorksheet1
Balance each redox reaction in acid solution.
Mn 2+ + BiO3 - Æ MnO4 - + Bi 3+
MnO4 - + S2O3 2- Æ S4O6 2- + Mn 2+
ClO3 - + Cl - Æ Cl2 + ClO2
P + Cu 2+ Æ Cu + H2PO4 -
PH3 + I2 Æ H3PO2 - + I -
NO2 Æ NO3 - + NO
Basic Solutions
MnO4 - + C2O4 2- Æ MnO2 + CO2
ClO2 Æ ClO2 - + ClO3 -
Cu(NH3)4 2+ + S2O4 2-Æ SO3 2- + Cu + NH3
Zn + NO3 - Æ Zn(OH)4 2- + NH3
Al + OH - Æ AlO2 - + H2
Zn Æ Zn(OH)4 2- + H2
Answers
Acidic:
14 H + + 2 Mn 2+ + 5 BiO3 - Æ 2 MnO4 - + 5 Bi 3+ + 7 H2O
16 H + + 2 MnO4 - + 10 S2O3 2- Æ 2 Mn 2+ + 8 H2O + 5 S4O6 2-
4 H + + 2 ClO3 - + 2 Cl - Æ 2 ClO2 + 2 H2O + Cl2
8 H2O + 2 P + 5 Cu 2+ Æ 2 H2PO4 - + 12 H + + 5 Cu)
4 H2O + 2 PH3 + 3 I2 Æ 2 H3PO2 - + 8 H + + 6 I -
H2O + 3 NO2 Æ 2 NO3 - + NO + 2 H +
Basic:
4 H2O + 2 MnO4 - + 3 C2O4 2- Æ 2 MnO2 + 8 OH - + 6 CO2
2 OH - + 2 ClO2 Æ ClO2 - + ClO3 - + H2O
Cu(NH3)4 2+ + S2O4 2- + 4 OH - Æ Cu + 4 NH3 + 2 SO3 2- + 2 H2O
6 H2O + NO3 - + 7 OH - + 4 Zn Æ NH3 + 4 Zn(OH)4 2-
2 Al + 2 H2O + 2 OH - Æ 2 AlO2 - + 3 H2
2 OH - + Zn + 2 H2O Æ Zn(OH)4 2- + H2
pf2

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Balancing Redox Reactions Worksheet 1

Balance each redox reaction in acid solution.

Mn

  • BiO

Æ MnO

  • Bi

MnO

+ S2O

Æ S4O

  • Mn

ClO

  • Cl

Æ Cl2 + ClO

P + Cu

Æ Cu + H2PO

PH3 + I2 Æ H3PO

+ I

NO2 Æ NO

+ NO

Basic Solutions

MnO

+ C2O

Æ MnO2 + CO

ClO2 Æ ClO

  • ClO

Cu(NH3)

+ S2O

Æ SO

  • Cu + NH

Zn + NO

Æ Zn(OH)

+ NH

Al + OH

Æ AlO

+ H

Zn Æ Zn(OH)

+ H

Answers

Acidic:

14 H

  • 2 Mn

2+

  • 5 BiO
  • Æ 2 MnO - + 5 Bi

3+

  • 7 H2O

16 H

  • 2 MnO
    • 10 S2O

2- Æ 2 Mn

2+

  • 8 H2O + 5 S4O

2-

4 H

  • 2 ClO

    • 2 Cl

      Æ 2 ClO2 + 2 H2O + Cl

8 H2O + 2 P + 5 Cu

2+ Æ 2 H2PO

    • 12 H
  • 5 Cu)

4 H2O + 2 PH3 + 3 I2 Æ 2 H3PO

    • 8 H
  • 6 I

H2O + 3 NO2 Æ 2 NO

    • NO + 2 H

Basic:

4 H2O + 2 MnO

    • 3 C2O

2- Æ 2 MnO2 + 8 OH

    • 6 CO

2 OH

    • 2 ClO2 Æ ClO

      + ClO - + H2O

Cu(NH3)

2+

  • S2O

2-

  • 4 OH
  • Æ Cu + 4 NH3 + 2 SO

2-

  • 2 H2O

6 H2O + NO

    • 7 OH

      + 4 Zn Æ NH3 + 4 Zn(OH)

2-

2 Al + 2 H2O + 2 OH

  • Æ 2 AlO - + 3 H

2 OH

    • Zn + 2 H2O Æ Zn(OH)

2-

  • H

Balancing Redox Reactions Worksheet 2

Balance each redox reaction in acid solution.

H2 O 2 + Cr 2 O 7

2-

Æ O 2 + Cr

3+

TeO 3

2-

+ N 2 O 4 Æ Te + NO 3

ReO 4

+ IO

Æ IO 3

+ Re

PbO 2 + I 2 Æ Pb

2+

+ IO 3

As Æ H 2 AsO 4

+ AsH 3

Balance each redox reaction in basic solution.

O 2 + Cr

3+

Æ H 2 O + Cr 2 O 7

2-

Te + NO 3

Æ TeO 3

2-

+ N 2 O 4

IO 3

+ Re Æ ReO 4

+ IO

Pb

2+

+ IO 3

Æ PbO 2 + I 2

Cr 2 O 7

2-

+ Hg Æ Hg

2+

+ Cr

3+

Answers:

8H

  • 3H 2 O 2 + Cr 2 O 7

2- Æ 3O 2 + 2Cr

3+

  • 7H 2 O

TeO 3

2 -

  • 2N 2 O 4 + H 2 O Æ Te + 4NO 3
    • 2H

4H

  • 4ReO 4

    • 7IO

      Æ 7IO 3 - + 4Re + 2H 2 O

8H

  • 5PbO 2 + I 2 Æ 5Pb

2+

  • 2IO 3
    • 4H 2 O

12H 2 O + 8As Æ 3H 2 AsO 4

    • 5AsH 3 + 3H

3O 2 + 8OH

    • 2Cr

3+ Æ H 2 O + 3H 2 O 2 + Cr 2 O 7

2-

H 2 O + Te + 4NO 3

  • Æ TeO 3

2-

  • 2OH
    • 2N 2 O 4

7IO 3

    • 4OH

      + 4Re Æ 4ReO 4 - + 7IO - + 2H 2 O

8OH

    • 5Pb

2+

  • 2IO 3
  • Æ 5PbO 2 + I 2 + 4H 2 O

7H 2 O + Cr 2 O 7

2-

  • 3Hg Æ 3Hg

2+

  • 14OH
    • 2Cr

3+