為什麼在進行焰色實驗前要把導線要浸於氫氯酸中
回答 (3)
2006-10-22 9:08 am
✔ 最佳答案
氫氯酸係用作清洗導線表明可能存在嘅雜質，而且氫氯酸遇熱能迅速揮發而不影響實驗結果。導線上嘅雜質同氫氯酸反應后變成咗鹽，溶解于溶液中。所以o個瓶溶液就變成咗氫氯酸溶液同埋鹽溶液嘅混合物。
2006-10-22 01:11:30 補充：
導線上嘅雜誌係指金屬，因爲不同金屬嘅焰色反應顔色唔同，所以如果不除去o個D金屬，就會影響到實驗結果。
2006-10-22 9:39 am
Flame test:
step 1.Dip the platinum wire to concentrated HCl
(some metal power might remain on the wire in the last time,so you should remove the metal remainder by concentrated HCl.)
eg.2HCl+Mg→MgCl2+H2
therefore the result in flame test can be more accurate
step 1.Dip the platinum wire to concentrated HCl
(some metal power might remain on the wire in the last time,so you should remove the metal remainder by concentrated HCl.)
eg.2HCl+Mg→MgCl2+H2
therefore the result in flame test can be more accurate
2006-10-22 9:09 am
因為要整走係導線o既物質~
防止實驗有誤差~~
防止實驗有誤差~~
收錄日期: 2021-05-03 01:34:11
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061022000051KK00284