Starch & Iodine (solved)
平時用starch solution黎試iodine既時候咪淨係可以落幾滴既~ 咁落多左, (例如10ml啦) 會點嫁? 點解做親lab都話唔好落咁多既?
據聞個reaction會唔同左, 咁有咩唔同? 個product會變左咩?
Starch & Iodine (solved) 15分
2006-10-21 6:04 pm
回答 (2)
2006-10-21 9:58 pm
✔ 最佳答案
其實iodine會走入starch的份子裡面變成紫色,如果落多左starch solution可能有d iodine走唔返出來,影響讀數,所以要在好淡黃色先至落starch solution免得iodine在starch份子太耐!!而starch solution係唔會consume iodine架!!!
2006-10-21 7:58 pm
你梗係唔好落咁多滴la...因為...個starch solution 會同iodine react, 某程度來講係consume 梗 d iodine o既number of mole 架.....你如果落多左...咁..iodine咪react得多左...相對來講...同佢本身要react果樣野咪少左lor...咁...個burette reading 咪唔準lor....所以你做titration果陣...等d iodine fades到淡黃色果陣先好落兩三滴starch solution落去丫....
參考: 老師
收錄日期: 2021-04-13 16:24:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061021000051KK00984