Express your answer as a chemical equation. Cl2(g) NaOH(aq)→NaClO3(aq) -[Free] B97
Express your answer as a chemical equation Cl2(g) NaOH(aq)→NaClO3(aq) NaCl(aq) H2O(l) Identify all of the phases in your answer.
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Part D: Chemical Equation Balancing
Question:
Balance the chemical equation:
Cl₂(g) + NaOH(aq) → NaClO₃(aq) + NaCl(aq) + H₂O(l)
Express your answer as a chemical equation. Identify all of the phases in your answer.
Step 1: Identify the type of reaction:
This is a disproportionation reaction where chlorine is both oxidized and reduced:
- Cl₂ (0) → Cl⁻ (-1) in NaCl (reduction)
- Cl₂ (0) → Cl⁺⁵ in NaClO₃ (oxidation)
Step 2: Balance the redox electrons:
- Each Cl⁻ gains 1 electron
- Each ClO₃⁻ loses 5 electrons
- To balance, 5 Cl⁻ are needed for every 1 ClO₃⁻
Step 3: Use smallest whole number ratios:
- 1 mol NaClO₃
- 5 mol NaCl
- Total Cl atoms = 6, so 3 Cl₂
Step 4: Balance Na and O:
- 6 Na from NaOH → 6 NaOH(aq)
- 3 H₂O to balance H and O
Final balanced equation (with phases):
3Cl₂(g) + 6NaOH(aq) → NaClO₃(aq) + 5NaCl(aq) + 3H₂O(l)
✔️ This balanced equation satisfies the conservation of mass and charge for all atoms including Cl, Na, H, and O.