(1)试管;分液漏斗
(2)2H 2O 2 ===2H 2O + O 2↑
(3)2NH 4Cl + Ca(OH) 2=== CaCl 2 + 2NH 3↑+ 2H 2O;A
(4)氨气的密度比空气小、氨气易溶于水、氨气的水溶液呈碱性等