文一
1. Make a mind map of all organic reactions,make sure you know the conditions for all of them (e.g. excess NH3 for thehalogenoalkane reaction and WHY)
2. Do ALL structural elucidation questions inyour ALL of your past year papers, better yet, do EVERYTHING
3. For inorganic make sure you know very wellwhat types of electrostatic attractions are between different types ofcompounds and what are the factors affecting them. (e.g. melting points ofbranched alkane vs. straight chain alkane)
4. LE CHATLIER’S PRINCIPLE (e.g. know what happens when an inert gasis injected into a constant volume container, what about constant pressure?)
5. Remember you can always reverse-engineeryour way through a question, e.g. if they ask you to explain why the solubilityof Ba(OH)2 is better than Mg(OH)2 you MUST know that it is already true andjust piece together a REASONABLE explanation. Principle is charity says as longas it’sreasonable you get marks.
6. DON’T PANIC during MCQ (you will), don’t ever spend too much time stuck on one MCQ question, just move on,it’s not worth the time and 1 qn isn’t even worth 1 mark so just screw it ok
文二
相信大家在J2都已经从刚刚接触到H2化学的懵懂状态过渡到了艰苦复习塞知识点到脑子里的状态(大神请忽略这句话)。对于化学,我的建议是把化学的topics从易到难地复习,如果在简单的基础的东西上都还有问题的话,更难的章节就比较难捡起来了。下面有一个我认为的简单的topics的层次分级:
有机化学:
Level 1:
1) Naming of organic compounds
2) Chemical Bonding and interactions
3) Drawing of ionic and covalent compounds
Level 2:
1) Isomerism
2) Reaction mechanisms
Level 3:
All kinds of organic compounds (alkanes,alkenes……)
有机化学很多人觉得有难度的点应该是背各种莫名其妙的反应,以及推断出未知的化合物。这样的感觉是因为对反应发生的原理和过程没有一个清楚的认识,仔细地去把基础的东西补好,会发现其实不同化合物的化学反应式会有相通的地方,就算不背,用基础理论比如electrophilicity和nucleophilicity
也可以推断出来大概的反应条件和过程。复习的时候建议都把那种一个小册子一样的organicchem的反应总结买上,在上面可以做各种笔记,千万别对着它死记硬背反应方程式(不过不得不承认有一小部分是需要背的)
除有机化学:
Level 1:
1) Mole Concept
2) Atomic and molecular Structures
3) Balancing equations
4) Periodic table
5) Chemical Bonding and VSEPR
Level 2:
1) Energetics and Kinetics
Level 3:
1) Chemical Equilibrium
2) Ionic Equilibrium
3) Solubility Equilibrium
4) Group 2 and 17
5) Transition Elements
除去有机化学的部分之后,剩下的部分大多都是基础的概念和计算题(Group 2 and 17也算是基础概念偏多的应用章节),只有一个背得多一些的是TransitionElements的反应式。这一部分在复习的时候可能需要更着重于计算的练习,将Energetics,Kinetics和Equilibrium的计算正确率练起来,保证paper2的计算题的分基本都拿到手会是比较快的提分方法。
至于TransitionElements,如果大家有去看最近的题,会发现它是有常考点的,比如说blood-redcompound或者Prussian blue compound的识别之类。在保证前面TransitionElements的性质解释那里没问题的前提下,后面的例子们可以找找规律,背得聪明一些。
如果你还在J1,真心地建议你把所有基础的东西都完完全全地弄懂,有很多基础的东西比如chembonding是跨了非常多章节的,千万不要把问题留到J2东西越学越多的时候才回头去补上。如果在J2,嗯……考试加油:)
这一篇只是个人的一些小建议,真正落到实处还是要靠大家花时间多见题多做题,找准keywords,把速度练起来,所以大家加油吧哈哈,考到心仪的学校去。