试设计一个实验方案,把含有铵根离子和钙离子的溶液中的两种阳离子进行分离,最后分别制成NH4Cl和CaCl2溶液.

相关推荐

• 试设计一个实验方案,把含有铵根离子和钙离子的溶液中的两种阳离子进行分离,最后分别制成NH4Cl和CaCl2溶液.
• 英语翻译They crossed in front of me as I was driving out of the store parking lot.I would be delayed for a whole ten seconds.However,I realized that it was an elderly couple.No more anger.　　The man leaned on his wife who walked in front of him.He not only used her for support but it was obvious that he was blind.She was his eyes as well.The two of them worked as one --- each needing the other to function(起作用) in this fast-changing world.　　That little exam
• What is your favourite holiday and why?一分钟英语演讲三十分钟内弄出来!好的加悬赏,不好的X.