实验中有哪些不恰当的操作会导致试管破裂?(至少说出四种)
实验中有哪些不恰当的操作会导致试管破裂?(至少说出四种)
化学人气:133 ℃时间:2019-08-21 01:06:56
优质解答
1.加热时试管底部碰到了酒精灯芯\x0d2.加热前试管外壁没有擦干,加热前没有预热\x0d3.加热产生的水蒸气冷凝倒流使试管破裂,即试管口没有略低于试管底4.没有等到试管温度降到室温就用水清洗试管
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