全部评论(4条)
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- BJXDJYG 2010-05-11 00:00:00
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- golastroom 2010-05-11 00:00:00
- 可以适当蘸水,使它更容易套进。你可以将它蘸水后,将其慢慢旋入,切勿硬套入,这样会损坏仪器 LZD说得虽然是不错,但是反应太过于微弱了吧,一般是可以忽视的
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- 疯疯疯丫头2 2010-05-11 00:00:00
- 不要,玻璃中的Si会和水反应。 严格的说硅能和水反应 只不过反应过于微弱 一般都视为不反应 有方程为证 Si+2NaOH+H2O=Na2SiO3+2H2 是由方程 Si+4H2O=H4SiO4+2H2↑ H4SiO4=H2SiO3+H2O H2SiO3+2NaOH=Na2SiO3+2H2O 合成的
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- antisocial7 2010-05-11 00:00:00
- 先把长颈漏斗的下端蘸水,然后稍带旋转的塞进胶塞中,期间要注意不可用力过猛,以防扎了手。
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