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中学化学主要实验的现象描述汇总
红棕色气体消失,液面上升,有无色气体产生。 瓶中空间部分显红棕色,硝酸呈黄色。 有大量的白烟产生。 2NH3+H2SO4=(NH4)2SO4生成化肥硫铵。 3NH3+H3PO4=(NH4)3PO4生成化肥磷酸铵。 有白色胶状沉淀产生。 溶液变浑浊。 瓶内壁有黄色粉末生成。 泡沫逐渐减少 ...
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