係 New Certificate Chemistry Complete Notes and Wxam Practices 1 P.144 入面講 Ammonia gas 可以 turn wet blue litmus paper red 點解?
明明turn moist red litmus paper blue
Ammonia solution 咪有 acid and alkali 既特性囉?
ammonia gas???
2010-03-21 11:29 pm
回答 (2)
2010-03-22 1:40 am
✔ 最佳答案
This is an incorrect printing. It should be :"Ammonia gas can turn wet red litmus paper blue."
Ammonia is alkaline to litmus.
2010-03-24 10:22:42 補充：
你本書都話係 alkaline gas。你幾時見過 alkaline solution turns blue litmus paper to red 呀？分明係書錯啦。
香港 D 書時常錯得咁離譜啦，所以連古人都話「盡信書不如無書」。
參考: micatkie
2010-03-22 1:40 am
應該係你本書打錯.
NH3 +H2O → (NH4)+ + OH-
Ammonia gas ionizes in water to give OH- ions,
which should turn moist red litmus paper blue.
NH3 +H2O → (NH4)+ + OH-
Ammonia gas ionizes in water to give OH- ions,
which should turn moist red litmus paper blue.
收錄日期: 2021-04-13 17:09:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100321000051KK00951