[DSE化學2018]同學準備好DSE CHEM未?

姐係點

即係佢可以問你how to show that the reaction is first order by graph
你要答plot rate against concentration
a straight line passing through the origin is obtained (and rate is directly proportional to concentration) -> 1st order

咁可唔可以用differential嘅概念

U chem都係9背
如果你肯背bio,咁chem既workload應該係哩個細10倍左右

有啲背得嚟又背唔到 食屎狗eg orbital
其實係唔鐘意計數嗰part(physical Chem)
Biochem/org chem都還可

orbital都叫背咩
spdf 不過你都係睇好D DSE先
advanced chem考曬試再睇都未遲

入到先再揀 首先要入到

phy我會建議中大
chem港大
bio唔知

講真science其實三大讀既野都唔會話差好遠
當然你計間U本身個朵就唔同講法啦
如果第時想讀上postgrad
不如睇下想讀個field既professor個名響唔響
比你跟到個有頭有面既老細 你想去邊度讀/做野都易d

巴打又係我
Elephant toothpaste expt
Can the decomposition reaction of H2O2 be accurately followed by measuring the volume of the foam produced in different period of time during the experiment?
應該點解釋
呢類題目好弱

巴打又係我
Elephant toothpaste expt
Can the decomposition reaction of H2O2 be accurately followed by measuring the volume of the foam produced in different period of time during the experiment?
應該點解釋
呢類題目好弱

應該唔得
因為rate to high (almost instant complete)
而且foam係liquid+gas bubbles, difficult to measure the exact volume.

3大chem phd留名
利申 當年dse chem得5

3大chem phd留名
利申 當年dse chem得5

過左去就算啦
大學先叫做適合求知識既地方

又推推
呢排好多學生又sport day又UT又SBA
攪到聽日要出去幫幾個補堂

巴打又係我
Elephant toothpaste expt
Can the decomposition reaction of H2O2 be accurately followed by measuring the volume of the foam produced in different period of time during the experiment?
應該點解釋
呢類題目好弱

應該唔得
因為rate to high (almost instant complete)
而且foam係liquid+gas bubbles, difficult to measure the exact volume.

Thanks巴打

無變 同埋之前個syllabus基本上都係cut左野 無加新野

路過好奇想問下
樓主認唔認為dse chem太淺
orbital提少少又唔考，organic chem唔考mechanism變左好多reaction都係背書
我係第一屆考dse，見證以前AL撚成日笑dse太淺

Org chem 考唔考mechanism 都係背書

教既mechanism淺, 考既範圍廣到不得了 根本背唔黎

大學都係open book啦

邊間大學open book

以前take過synthesis 係open book

有咩意思
organic chem就係唔想你死記,而係由個reagent推斷個mechanism再諗個product應該係乜野

無錯
open book先唔好
代表佢份卷難到比你即場查書都無用

你講得無錯
畫mechanism係靠創作

但以前考試真係睇kkwong notes膠背

Chem post 留名
但點解呢到好似chem u grad 多過dse

早晨 是星期六呢 應該再操chem了

3大chem phd留名
利申 當年dse chem得5

幫手答問題/諗問題造福後人

幫chem人就業輔導

無變 同埋之前個syllabus基本上都係cut左野 無加新野

路過好奇想問下
樓主認唔認為dse chem太淺
orbital提少少又唔考，organic chem唔考mechanism變左好多reaction都係背書
我係第一屆考dse，見證以前AL撚成日笑dse太淺

Org chem 考唔考mechanism 都係背書

教既mechanism淺, 考既範圍廣到不得了 根本背唔黎

大學都係open book啦

邊間大學open book

以前take過synthesis 係open book

有咩意思
organic chem就係唔想你死記,而係由個reagent推斷個mechanism再諗個product應該係乜野

無錯
open book先唔好
代表佢份卷難到比你即場查書都無用

你講得無錯
畫mechanism係靠創作

但以前考試真係睇kkwong notes膠背

其實AL chem甚至大學UG level chem既mechanism都係記pattern啫
好少話要完全自己諗
真係mechanism要用isotope labeling去support

Chem post 留名
但點解呢到好似chem u grad 多過dse

大部分人未覺殺到埋身掛
都好既 有多d有料人士/過來人撐下場 分享下經驗
唔係個個以為出去補大型就覺得自己dse實掂

Sorry makovnikov巴打宜家先上水
有咩想問
Btw下次有野去research post揾我 我應該會快d應到你

16dse考生

想問吓18 個syllabus有無轉

Sorry makovnikov巴打宜家先上水
有咩想問
Btw下次有野去research post揾我 我應該會快d應到你

屌你咁遲應

Sorry makovnikov巴打宜家先上水
有咩想問
Btw下次有野去research post揾我 我應該會快d應到你

屌你咁遲應

第2步D bonding跳得咁奇怪既 ?係咩reaction黎

一d都唔奇怪
Deprotonation generate個nucleophile出黎
再attack個double bond炸wo
未讀過Michael acceptor咩

Sorry makovnikov巴打宜家先上水
有咩想問
Btw下次有野去research post揾我 我應該會快d應到你

屌你咁遲應

第2步D bonding跳得咁奇怪既 ?係咩reaction黎

一d都唔奇怪
Deprotonation generate個nucleophile出黎
再attack個double bond炸wo
未讀過Michael acceptor咩

仲有我特登畫埋3D 等你知道有個6 membered ring transition state 可以做[3,3]-sigmatropic rearrangement

Sorry makovnikov巴打宜家先上水
有咩想問
Btw下次有野去research post揾我 我應該會快d應到你

屌你咁遲應

第2步D bonding跳得咁奇怪既 ?係咩reaction黎

一d都唔奇怪
Deprotonation generate個nucleophile出黎
再attack個double bond炸wo
未讀過Michael acceptor咩

仲有我特登畫埋3D 等你知道有個6 membered ring transition state 可以做[3,3]-sigmatropic rearrangement

Michael addition 會break C-C bond嫁咩

唔會
所以實際上個reaction係sigmatropic rearrangement黎
讀左未