Bleaching with Sodium Hypochlorite
NaClO + dye → NaCl + oxidized dye
Overview
Sodium hypochlorite (bleach) oxidizes colored organic molecules by breaking the conjugated double bond systems (chromophores) that absorb visible light. The hypochlorite ion (ClO⁻) acts as the oxidizing agent, being reduced to chloride (Cl⁻). This destroys the molecule's ability to absorb colored light.
Participants
| Role | Substance | Coefficient | State |
|---|---|---|---|
| Reactant | Sodium Hypochlorite NaClO | 1 | (aq) |
| Product | Sodium Chloride NaCl | 1 | (aq) |
Everyday Example
Household bleach (3-8% NaClO) removes stains from clothes and disinfects surfaces by oxidizing organic matter including bacteria.
Industrial Importance
Sodium hypochlorite is used in water disinfection worldwide, in pulp and paper bleaching, textile processing, and as a sanitizer in the food industry.
Properties
- Type
- Redox
- Reversible
- No
- Energy
- Exothermic
Related Reactions
Aqua Regia Dissolving Gold
Cerium(IV) Reduction by Iron(II)
Chlorine Oxidation of Bromide
Chromate-Dichromate Equilibrium
Contact Process SO₂ Oxidation
Copper Displaced by Iron
Copper Oxidation by Nitric Acid
Copper Patina Formation (Verdigris)
Copper Reduction of Silver Ion
Dichromate Oxidation of Ethanol
Frequently Asked Questions
What is the equation for Bleaching with Sodium Hypochlorite?
The balanced equation is: NaClO + dye → NaCl + oxidized dye.
What type of reaction is Bleaching with Sodium Hypochlorite?
Bleaching with Sodium Hypochlorite is a redox reaction.
Is Bleaching with Sodium Hypochlorite exothermic or endothermic?
Bleaching with Sodium Hypochlorite is exothermic (releases energy).