in the lab, how to test water by using salt?
help!
how to test water with salt?
2007-12-07 1:34 am
回答 (3)
2007-12-08 4:35 am
✔ 最佳答案
first,use distillationsecond,use dry cobalt(2) chloride test paper test the fraction
the paper change from blue to pink
after distillation, it remains some powder
it contains some salt
final,test different salt use different method
like flame test test the positive ion
use some solution test negative ion
2007-12-07 8:31 pm
"dehydrated Cobalt Chloride(dehydrated is a must)" can be used to test water
it will change colour from blue to pink when this salt react with water
it will change colour from blue to pink when this salt react with water
參考: sorry for my poor english.
2007-12-07 2:24 am
1.Put some water into the test tube.
2.Use the spatula to add salt into the test tube.
3.Shake it.
2.Use the spatula to add salt into the test tube.
3.Shake it.
參考: ME
收錄日期: 2021-04-13 14:39:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071206000051KK02079