[DSE化學2018]同學準備好DSE CHEM未?

1001 回覆
89 Like 24 Dislike
2017-12-26 10:39:13
我諗order背後既邏輯對中學level黎講有d難度
有興趣既睇下書上wiki望我唔反對
但我個人比較建議適當時機再學 否則好易亂
2017-12-26 13:17:05
要識數organic compound入面d oxidation no.?[img]assets/faces/xm/wonder2.gif[/img]

唔洗
龜蛇不嬲鐘意同我地玩下
2017-12-26 14:00:30
要識數organic compound入面d oxidation no.?[img]assets/faces/xm/wonder2.gif[/img]

唔洗
龜蛇不嬲鐘意同我地玩下

2017-12-26 17:08:28
Industrial chem洗唔洗識manufacture of ethanoic acid
見syllabus好似有提 係要背埋啲process定知啲principles就夠
2017-12-26 17:20:18
媽啊chem好多野記
2017-12-26 17:27:55
講明唔考manufacture ch3cooh 既詳情
佢只係話用呢個為例 去apply green chem既principles

pdf p.75
http://www.edb.gov.hk/attachment/en/curriculum-development/kla/science-edu/ref-and-resources/Supplementary_note_for_Chem_30Oct2015_e.pdf
Details of industrial processes of the manufacture of acetic acid are not expected.
2017-12-26 22:15:21
我想問下an chem係咪要學計ppm嗰啲?
18 dse chem 3底 對呢科真係好迷茫
2017-12-26 22:20:17
ppm , ppb果d唔洗
但要識計一d唔common既單位
例如mg dm-3 , mol cm-3 之類
2017-12-26 22:21:08
其實單位呢家野有skill對付 明到既咩單位都唔怕
2017-12-27 00:38:14
唔算strong
E.C.S.當佢SO2咁計
通常係同Cl2 Br2 I2 Fe3+呢d做redox
2017-12-27 01:36:09
yes
2017-12-28 12:10:39
開工又推下
2017-12-28 12:21:45
你不如算啦 🐢sir,唔好教錯人
我明白你本意好,但唔岩真係唔岩
2017-12-28 12:24:46
幫推..

17dse雞留名。如果上年你咁早出現,我可能輕鬆好多。大家要加油💪

我而家間唔中睇番我既dse chem問題簿,我9成問題而家都唔識答 。講緊幾乎唔記得曬dse chem既野 , so sad
2017-12-28 12:29:20
又唔好咁講 大家研究下咁啫
好多時學生唔識 老師講兩句提下已經好有用
btw咁大學chem真係唔係好關dse chem事 根本大家個核心都唔同
2017-12-28 12:32:57
唔係架,真心覺得你好好。concept 清得黎,點到即止。如果上年咁早出現,我好多問題唔洗拖到成2/3月先完全KO. 但識得快,忘記得仲好,咩in chem an chem concept 9成唔記得

Btw 大學唔係讀chem,唔洗點知好標準真實既chem eg spdf? 唔肯定係咪咁
2017-12-28 12:43:42
spdf係orbital AL chem都有學
大學時期既orbital係幾難
好記得year 1時個inorg professor成日上堂問人high spin定low spin
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