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怎樣連接長(zhǎng)頸漏斗與單孔塞

纖纖小諾 2010-05-10 08:11:43 338  瀏覽
  • 要不要蘸水?急?。?!... 要不要蘸水?急!??! 展開

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  • BJXDJYG 2010-05-11 00:00:00
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  • golastroom 2010-05-11 00:00:00
    可以適當(dāng)蘸水,使它更容易套進(jìn)。你可以將它蘸水后,將其慢慢旋入,切勿硬套入,這樣會(huì)損壞儀器 LZD說得雖然是不錯(cuò),但是反應(yīng)太過于微弱了吧,一般是可以忽視的

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  • 瘋瘋瘋丫頭2 2010-05-11 00:00:00
    不要,玻璃中的Si會(huì)和水反應(yīng)。 嚴(yán)格的說硅能和水反應(yīng) 只不過反應(yīng)過于微弱 一般都視為不反應(yīng) 有方程為證 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
    先把長(zhǎng)頸漏斗的下端蘸水,然后稍帶旋轉(zhuǎn)的塞進(jìn)膠塞中,期間要注意不可用力過猛,以防扎了手。

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