漂白水既化學式係咩??

2007-05-04 12:16 am
漂白水既化學式係咩??

回答 (5)

2007-05-04 1:25 am
✔ 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
參考: me*
2007-05-19 12:15 am
SO2 + H2O ⇔ H2SO3
2007-05-06 2:25 am
"chlorine bleach", a solution of sodium hypochlorite (NaClO),
"oxygen bleach", which contains hydrogen peroxide(H2O2)
2007-05-04 12:29 am
若使用的漂白水中次氯酸鈉濃度高過或低於5.25%,所用分量便要相應調
整。
計算方法:漂白水分量倍數 = 5.25 ÷漂白水的次氯酸鈉濃度。
舉例說,使用的漂白水只含有5%次氯酸鈉,所用分量倍數便是5.25÷5=1.05倍。即是用10 x 1.05 = 10.5毫升漂白水來調校濃度。
2007-05-04 12:25 am
"漂白水" is called sodium hypochlorite with the formula NaClO


收錄日期: 2021-04-12 20:25:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070503000051KK01917

檢視 Wayback Machine 備份