點解要acidify potassium permanganese??
用未acidified 的KMnO4, 同Fe2+ react, 係咪會冇reaction???
收錄日期: 2021-04-13 16:41:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070224000051KK02026