有什麼compound會吸水(20分)要多dd wor^^唔該 @ dlxpxv7的部落格

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有什麼compound會吸水(20分)要多dd wor^^唔該

發問:

有咩compound會吸水姐係有咩salt 呀solution可以吸水同埋點解可以吸水既?

最佳解答:

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如果個compound係gas 的話可以用 1. conc. H2SO4(l) 2.anhydrous CaCl2(s) 3.anhydrous MgSO4(s) 4.anhydrous KOH(s) 5.anhydrous NaOH(s) 個如果個compound 係liquid state 就唔好用conc.H2SO4(l), 因為大家都係liquid, 要用d separation method 先分得開, 應該用anhydrous CaCl2(s) 同 anhydrous MgSO4(s)等solid 吸完水再用filtration就可分出個pure compound 如果個compound 係solid state 的話,用oven (焗爐)heat 用compound, 總之唔高過boiling point就得不過,仲有要留意個compound係acidic or alkaline, 1同2 都係acidic, 3就係neutral, 4同5係alkaline , 即係dry alkaline compound 唔可以用1同2 因為alkaline 同acidic會有reaction, 個compound 會少左相反acidic compound 唔可以用4同5

其他解答:

calcium chloride, sodium hydroxide, potassium hydroxide, concentrated sulphuric acid. these can be regarded as dehydrating agents.