CIE A Level Chemistry复习笔记3.2.7 Production of Alkenes
Production of Alkenes: Elimination, & Dehydration Reactions & Cracking Alkenes can be made by a series of reactions including elimination, dehydration reactions and cracking Elimination rea...
CIE A Level Chemistry复习笔记3.2.6 Combustion of Alkanes
Combustion of Alkanes & the Environment Cars’ exhaust fumes include toxic gases such as carbon monoxide (CO), oxides of nitrogen (NO/NO2) and volatile organic compounds (VOCs) When released int...
CIE A Level Chemistry复习笔记3.2.5 Chemical Reactivity of Alkanes
Unreactivity of Alkanes Strength of C-H bonds Alkanes consist of carbon and hydrogen atoms which are bonded together by single bonds Unless a lot of heat is supplied, it is difficult to break these...
CIE A Level Chemistry复习笔记3.2.4 Cracking of Alkanes
Obtaining Useful Compounds by Cracking Crude oil Crude oil is a mixture of hydrocarbons containing alkanes, cycloalkanes and arenes (compounds with a benzene ring) The crude oil is extracted from t...
CIE A Level Chemistry复习笔记3.2.3 Free Radical Substitution
Free Radical Substitution Mechanism Alkanes can undergo free-radical substitution in which a hydrogen atom gets substituted by a halogen (chlorine/bromine) Ultraviolet light (sunlight) is needed fo...
CIE A Level Chemistry复习笔记3.2.2 Combustion & Free Radical Substitution of Alkanes
Combustion & Free Radical Substitution of Alkanes Alkanes are combusted (burnt) on a large scale for their use as fuels They also react in free-radical substitution reactions to form more react...
CIE A Level Chemistry复习笔记3.2.1 Alkanes
Production of Alkanes: Hydrogenation & Cracking Alkanes are hydrocarbons that can be produced by the addition reaction of hydrogen to an alkene or by cracking of longer alkane chains Production...
2022年英国经济专业TOP5院校介绍及专业招生要求
2023年申请季已经到来，大家是否已经有了目标院校和专业呢？ 经济学一直是备受广大家长和同学青睐的专业。如果想去英国读经济，哪些大学最值得读呢？ 今天我们就结合三大权威榜单（2022QS世界大学学科排名、2022...
CIE A Level Chemistry复习笔记3.1.13 Isomers of Organic Compounds
Deducing Isomers of a Compound You should be able to deduce all possible isomers for organic compounds knowing their molecular formula Worked example: Isomers of dibromopropane Step 1: Draw the str...
艺术留学到底好不好？
近年来，随着设计、艺术行业的发展，人们的审美和艺术需求日益增加，艺术设计领域已经摆脱了小众的标签，越来越多人进入这个专业领域，除了对艺术始终保持兴趣的艺术生，很多在综合类学校的非艺术生也中途选择了...
CIE A Level Chemistry复习笔记3.1.12 Chirality
Chirality & Enantiomers Chiral centres in non-cyclic molecules A chiral centre in a molecule is a carbon atom that has four different atoms or group of atoms attached This gives rise to two opt...
CIE A Level Chemistry复习笔记3.1.11 Stereoisomerism
Stereoisomerism: Geometrical & Optical Stereoisomers are compounds that have the same atoms connected to each other, however the atoms are differently arranged in space There are two types of s...
