[DSE化學2017]同學準備好DSE CHEM未?

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

因為2013LQ有條咁問，寫哂兩個唔俾分
但老師話現實情況冇H+個reaction係冇可能發生

唔係啊 一樣要H+
睇清楚題目點問, 13問LiAlH4 in what solvent =/= H+ isn't required in the rxn

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

啲reagent洗唔洗寫state symbol?

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

啲reagent洗唔洗寫state symbol?

如非必要，唔好寫
因為寫就要100%肯定正確

Lq Q15b問ketone變alcohol個reaction個reagent係咩喎
因為學校有買卷，啲師兄師姐寫咗LiAlH4有分
但寫1.LiAlH4 2.H+冇分

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

啲reagent洗唔洗寫state symbol?

如非必要，唔好寫
因為寫就要100%肯定正確

因為我學校老師話由alkene去haloalkane個步用嘅HCl係gas state要寫明，所以建議我地做synthetic route都寫，但我發覺成日都寫錯

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

啲reagent洗唔洗寫state symbol?

如非必要，唔好寫
因為寫就要100%肯定正確

因為我學校老師話由alkene去haloalkane個步用嘅HCl係gas state要寫明，所以建議我地做synthetic route都寫，但我發覺成日都寫錯

明白阿
但state好多唔係common state
寫錯就大0樂

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

因為2013LQ有條咁問，寫哂兩個唔俾分
但老師話現實情況冇H+個reaction係冇可能發生

唔係啊 一樣要H+
睇清楚題目點問, 13問LiAlH4 in what solvent =/= H+ isn't required in the rxn

Lq Q15b問ketone變alcohol個reaction個reagent係咩喎
因為學校有買卷，啲師兄師姐寫咗LiAlH4有分
但寫1.LiAlH4 2.H+冇分

頭先唔記得quote

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

因為2013LQ有條咁問，寫哂兩個唔俾分
但老師話現實情況冇H+個reaction係冇可能發生

唔係啊 一樣要H+
睇清楚題目點問, 13問LiAlH4 in what solvent =/= H+ isn't required in the rxn

Lq Q15b問ketone變alcohol個reaction個reagent係咩喎
因為學校有買卷，啲師兄師姐寫咗LiAlH4有分
但寫1.LiAlH4 2.H+冇分

頭先唔記得quote

hmmm
如果係咁，我都要lm跟進

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

啲reagent洗唔洗寫state symbol?

梗係唔好啦 寫錯左倒扣分仲衰

喱兩頁係咪唔洗記, 我老師話outc, 但我睇番2016年mc出左Ni-Cd cell嘅half equation

除左Zn-C cell / fuel cell要記構造+原理+反應+優缺點外
其他cell記優缺點OK
2016果題MC條式可以自己prove出黎

可唔可以講下個條點做
佢比咗2NiO(OH)+Cd+2H2O-->2Ni(OH)2+Cd(OH)2

首先拆返開oxidation同reduction

oxidation (-): Cd->Cd(OH)2 (Cd = 0->+2)
reduction (+): NiO(OH) -> Ni(OH)2 (Ni = +3->+2)

chemical cell既negative係放electron 即係做oxidation果邊
當個cell recharge時 各electrode既reaction會倒轉行

(-): Cd <- Cd(OH)2
(+): NiO(OH) <- Ni(OH)2

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

因為2013LQ有條咁問，寫哂兩個唔俾分
但老師話現實情況冇H+個reaction係冇可能發生

唔洗怕 寫曬照比分的
2013 Q15(b)
我check返我自己份真跡
當年係有寫曬
LiAlH4,dry ether
H+
佢照比分

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

啲reagent洗唔洗寫state symbol?

如非必要，唔好寫
因為寫就要100%肯定正確

因為我學校老師話由alkene去haloalkane個步用嘅HCl係gas state要寫明，所以建議我地做synthetic route都寫，但我發覺成日都寫錯

明白阿
但state好多唔係common state
寫錯就大0樂

咁係咪除左haloalkane轉alcohol嘅唔洗加heat, 其他加heat實冇死

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

因為2013LQ有條咁問，寫哂兩個唔俾分
但老師話現實情況冇H+個reaction係冇可能發生

唔係啊 一樣要H+
睇清楚題目點問, 13問LiAlH4 in what solvent =/= H+ isn't required in the rxn

Lq Q15b問ketone變alcohol個reaction個reagent係咩喎
因為學校有買卷，啲師兄師姐寫咗LiAlH4有分
但寫1.LiAlH4 2.H+冇分

頭先唔記得quote

寫曬照比架
係咪無寫清楚用ether as solvent

呢part係講緊咩

呢part係講緊咩

好多fat molecule contain C=C bond
hydrogenation可以令fat 入面d C=C變返C-C
咁就叫做hydrogenated vegetable oil 氫化植物油
可以減少trans fat

Chem practice paper
計熱能時幾時要加個g? 例如題目既CaO

人地比埋Ca(OH)2 ge heat capacity u
So CaO mass is used

Chem practice paper
計熱能時幾時要加個g? 例如題目既CaO

佢依家已經唔會咁問
會直接比個混合物最終體積你計

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

啲reagent洗唔洗寫state symbol?

如非必要，唔好寫
因為寫就要100%肯定正確

因為我學校老師話由alkene去haloalkane個步用嘅HCl係gas state要寫明，所以建議我地做synthetic route都寫，但我發覺成日都寫錯

明白阿
但state好多唔係common state
寫錯就大0樂

咁係咪除左haloalkane轉alcohol嘅唔洗加heat, 其他加heat實冇死

仲味答
樓主做synthetic個時有冇寫state

如果問reagent of oxidation of alcohols係咪寫LiAlH4就算 唔好寫要H+

最後寫曬實無死
1)LiAlH4,dry ether
2)H+

因為2013LQ有條咁問，寫哂兩個唔俾分
但老師話現實情況冇H+個reaction係冇可能發生

唔係啊 一樣要H+
睇清楚題目點問, 13問LiAlH4 in what solvent =/= H+ isn't required in the rxn

Lq Q15b問ketone變alcohol個reaction個reagent係咩喎
因為學校有買卷，啲師兄師姐寫咗LiAlH4有分
但寫1.LiAlH4 2.H+冇分

頭先唔記得quote

寫曬照比架
係咪無寫清楚用ether as solvent

佢哋幾個寫咗LiAlH4(ether) and H3O+
係咪因為冇分steps所以冇分
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