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中学化学主要实验的现象描述汇总
试管内有水珠,有刺激性气味使湿润的红色石蕊试纸变蓝的气体产生。 43.加热盛有固体氯化铵的试管: NH4Cl=(Δ)NH3↑+HCl↑ 试管底部固体减少,接近试管口出现白雾,凝结成白色晶体。 有刺激性气味的气体产生,使湿润的红色石蕊试纸变蓝。 电源的两极均有气泡 ...
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