[2022DSE CHEM化學]問答討論區

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9 Like 5 Dislike
2022-05-02 16:57:44
2022-05-02 17:02:03
2022-05-02 17:02:41
在此提提大家拎到5*又好5**都好 jupas千奇唔好揀Chem
除非屋企好有錢 唔駛靠自己返工個份
2022-05-02 17:11:17
咪撚讀science
2022-05-02 17:11:52
2022-05-02 17:14:27
年年一車車pure science
2022-05-02 17:21:38
yes完全係晒銀屎
2022-05-02 18:19:44
其實背後原理係咩?想學下out syl 野
2022-05-02 18:47:34
係囉 答嘅時候諗緊average no. of H bond per molecule
數倒CH3CH2CH2OH係1.5, CH3COOCH3係1, 跟住就圈咗D...
其實係咪要諗extensiveness, 數maximum no. of H bond或者total no. of H/lone pair on O?
2022-05-02 18:54:07
嚇親我啦
2022-05-02 19:01:02
呢題係咪三分
Colorimetry個題又係咩玩法
2022-05-02 19:04:20
補返個堅既先
嚇親大家唔好意思
下年上堂做呢題我一定特別叫學生唔好似我咁柒
2022-05-02 19:12:57
第一 Ester有兩個O可以同H2O個H form到H bond
第二 個 Ester Carbon Chain係短啲
當然其實係模糊 我覺得呢到最主要都係睇個Chain length
2022-05-02 19:16:34
其實應該要睇埋個OH group 喺邊度
佢而家喺terminal position 啲H bond 集中晒喺一邊
另一邊剩係得條hydrophobic tail 同水嘅interaction 太弱
要form 一個solvent cage 就會比較唔favorable
2022-05-02 19:18:53
所以你意思係
secondary alcohol 的 solubility 係大過 primary alcohol ?
given that same molecular formula
2022-05-02 19:25:21
我覺得呢個唔會係呢條嘅考慮範圍
2022-05-02 19:34:09
與其話係primary secondary 嘅分別不如話係越近中間就應該越soluble
Given 佢係一個好普通嘅aliphatic alcohol
2022-05-02 20:04:48
有冇話carbon chain多幾多先係dominant factor?今次ester 3個C alcohol 4個C 都只係多少少
所以no. of H bond方面比較次要
咁如果呢條擺喺SQ要Explain the difference 應該點答法?
2022-05-02 20:24:40
2022-05-02 20:28:16
Ching邊度有卷睇
2022-05-02 20:29:59
2022-05-02 20:30:26
2022-05-02 20:52:09
2022-05-02 20:57:39
Soluble
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