Question

Balance the following redox reaction in basic solution then answer these questions about the balanced reaction. Cl2(g) → Cl-(aq) + ClO-(aq)

Part 1: What is the stoichiometric coefficient in front of Cl2 in the balanced reaction?

Part 2: What is the stoichiometric coefficient in front of OH- in the balanced reaction?

Part 3: What is the stoichiometric coefficient in front of Cl- in the balanced reaction?

Part 4: What is the stoichiometric coefficient in front of OCl- in the balanced reaction?

Part 5: What is the stoichiometric coefficient in front of H2O in the balanced reaction?

Answer 1

Answer:- Part 1: stoichiometric coefficient in front of Cl2 in the balanced reaction = 1

Part 2: stoichiometric coefficient in front of OH- in the balanced reaction = 2

Part 3: stoichiometric coefficient in front of Cl- in the balanced reaction = 1

Part 4: stoichiometric coefficient in front of OCl- in the balanced reaction = 1

Part 5: stoichiometric coefficient in front of H2O in the balanced reaction = 1

Solution:- Cl₂(g) → Cl^-(aq) + ClO^-(aq)

for writing balance cell reaction in basic condition first we have to write unbalanced half cell reactions in oxidation and reduction

Oxidation Cl₂ → 2ClO^-

Reduction Cl₂ → 2Cl^-

now balance oxygen atoms to both sides and then balance hydrogen with adding OH^- and H₂O

Oxidation Cl₂ + 2H₂O + 4OH^- → 2ClO^- + 4H₂O

Reduction  Cl₂ → 2Cl^-

balance the charge to both sides by electrons

Oxidation Cl₂ + 2H₂O + 4OH^- → 2ClO^- + 4H₂O + 2e^-

Reduction  Cl₂ + 2e^- → 2Cl^-

balance the electrons factor to both sides

Oxidation Cl₂ + 2H₂O + 4OH^- → 2ClO^- + 4H₂O + 2e^-

Reduction Cl₂ + 2e^- → 2Cl^-

then add both  balanced half cell reactions

we get,

Cl₂ + 2OH^- → Cl^- + ClO^- + H₂O

this is a balanced reaction in basic condition

Part 1: stoichiometric coefficient in front of Cl2 in the balanced reaction = 1

Part 2: stoichiometric coefficient in front of OH- in the balanced reaction = 2

Part 3: stoichiometric coefficient in front of Cl- in the balanced reaction = 1

Part 4: stoichiometric coefficient in front of OCl- in the balanced reaction = 1

Part 5: stoichiometric coefficient in front of H2O in the balanced reaction = 1

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