我想問calcium carbonate and calcium hydroxide既分別,咁lime water係用邊一隻開先岩呢?
and then 要做乾燥劑唔用silica jel 可唔可以用calcium carbonate代替呀?
Calcium carbonate and hydroxide
2006-12-19 7:06 pm
回答 (3)
2006-12-19 9:17 pm
✔ 最佳答案
lime water其實係calcium hydroxide 溶於過量既水先出既，一般情況，我地都當Ca(OH)2係不溶水，以上係特別case.
怒我見識少，我未見過有CaCO3做乾燥劑，只用作中和泥土酸性。而silica jel 同calcium
chloride 都有吸水能力既…
最後，CaCO3係由Ca(OH)2+CO2生成既，LIME WATER 既白色PPT係CaCO3啦
2006-12-20 3:37 am
1.calcium carbonate .經過..strong heat...=calcium oxide+carbon dioxide
calcium oxide+water=calcium hydroxide(s)
calcium hydroxide(s)經過filtered...=calcium hydroxide(aq)
calcium hydroxide(aq)=limewater
第二條問題我唔清楚..sor..
calcium oxide+water=calcium hydroxide(s)
calcium hydroxide(s)經過filtered...=calcium hydroxide(aq)
calcium hydroxide(aq)=limewater
第二條問題我唔清楚..sor..
2006-12-19 7:14 pm
calcium carbonate is calcium plus carbon
calcium hydroxide is CaH2.
calcium hydroxide is CaH2.
收錄日期: 2021-04-29 22:02:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061219000051KK00756