✔ 最佳答案
漂白水有 2 種
chlorine bleach 同 sulphite bleach
chlorine bleach 係由 Cl2 + NaOH 而成
Cl2 + 2NaOH → NaOCl + NaCl + H2O
OCl- 係 oxidizing agent
佢會 bleach by oxidation
OCl- + dye → Cl- + (O + dye)
dye 係有色
(O + dye) 係 oxidized form, 冇色既
sulphite bleach 係 pass SO2 into water to form H2SO3
SO2 + H2O ⇔ H2SO3
H2SO3 有 H+ 同 SO3(2-)
SO3(2-) 係 reducing agent
佢會 bleach by reduction
SO3(2-) + dye → SO4(2-) + (dye - O)
dye 係有色
(dye - O) 係 reduced form, 冇色既