[DSE化學2017]同學準備好DSE CHEM未?

1001 回覆
44 Like 6 Dislike
2017-04-08 22:59:21
完全冇溫過 elective 係咪收得皮
2017-04-08 23:29:17
完全冇溫過 elective 係咪收得皮

溫唔溫得切睇你決心架啫
2017-04-09 00:01:46
完全冇溫過 elective 係咪收得皮

溫唔溫得切睇你決心架啫

想問下點樣溫elective最有效率 淨係做晒dse pp夠唔夠
2017-04-09 00:02:03
可唔可以講下soapy and soapless detergents
仲有nylon果d
教科書我睇唔比
單就考試黎講有咩要特別記?
2017-04-09 00:16:13
完全冇溫過 elective 係咪收得皮

溫唔溫得切睇你決心架啫

想問下點樣溫elective最有效率 淨係做晒dse pp夠唔夠

dse pp係好基本
同埋每年必出果d一定要好熟 例如order, Ea, haber, chloroalkali, functional group test, IR mass spec等等
ensure左基本分數先
另外要留意下好耐無出過既野 例如chromatography, atom econ, chloroalkali, energy profile, Ea equation等
2017-04-09 00:19:17
可唔可以講下soapy and soapless detergents
仲有nylon果d
教科書我睇唔比
單就考試黎講有咩要特別記?


soapy detergent = soap
head group一定係COO- 由animal fat 做

soapless detergent head group通常係SO3- / NH3+
由petroleum做

hard soft water / pollution problem果d唔考

要背熟detergent個working principle

nylon都係記下condensation polymerization過程(monomer A B合埋中間 甩small molecules)
要識分nylon同polyester幾時chain有H-bond, 幾時可以比acid/alkali hydrolysis
2017-04-09 01:05:03
Blue filter in colorimeter 係filter blue light out 定allow blue light to pass?
2017-04-09 02:05:06
Blue filter in colorimeter 係filter blue light out 定allow blue light to pass?


only allow blue light pass
你戴茶色眼鏡睇野都係茶色
2017-04-09 02:08:15
Blue filter in colorimeter 係filter blue light out 定allow blue light to pass?

to pass
你諗下拎張藍色玻璃紙望落個燈度
咪係有藍光

利申中文作文1左 唔知自己講緊乜
2017-04-09 02:08:55
Blue filter in colorimeter 係filter blue light out 定allow blue light to pass?

to pass
你諗下拎張藍色玻璃紙望落個燈度
咪係有藍光

利申中文作文1左 唔知自己講緊乜

sor 遲左
2017-04-09 09:57:18
其實wrt寫唔寫得
2017-04-09 10:56:24
其實wrt寫唔寫得

寫得
2017-04-09 11:45:57
想知攞個3要幾多

咩都唔熟唔識,好L驚,上堂唔係唔聽書,但就係唔識,宜家個人好灰,只係想求個3,見cut off果度又冇寫幾多
2017-04-09 11:46:16
如果工業記唔到 怕記錯乜乜process 條件
咩計Ea公式
入落計數機prog到 到時一出睇返

想問下係點入 唔係好識入
2017-04-09 12:23:45
先知點分兩舊ring form cpd是否enantiomer

另外,dse常出mc多人死,問有幾多no of structural isomer

呢兩個係我覺得org Chem 最煩膠野
2017-04-09 13:10:10
先知點分兩舊ring form cpd是否enantiomer

另外,dse常出mc多人死,問有幾多no of structural isomer

呢兩個係我覺得org Chem 最煩膠野

好似係

睇佢啲 substituent out from paper/behind paper 嘅組合系買唔同

例如 2 out 1 behind = 1 out 2 behind (純粹反轉咗個 molecule)
2017-04-09 16:02:09
除左peperation of salt/standard solution/soap同soap個啲原理要背之外, 仲有冇啲咩procedure係必背
2017-04-09 16:04:44
留名
2017-04-09 16:19:35
除左peperation of salt/standard solution/soap同soap個啲原理要背之外, 仲有冇啲咩procedure係必背

Enthalpy
2017-04-09 17:14:05
如果我上年見到呢個post就好
Anyway 2017dser加油
2017-04-09 17:17:07
冇溫過
利申:已drop
2017-04-09 20:26:46
大家有無記得double bond equivalence formula ?
2017-04-09 20:41:09
大家有無記得double bond equivalence formula ?

咩嚟
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