CIE A Level Chemistry復習筆記3.2.11 Markovnikov's Rule
Alkenes: Stability of Cations & Markovnikov's Rule Carbocations?are positively charged carbon atoms with only three covalent bonds instead of four There are three types of carbocations: primary...
CIE A Level Chemistry復習筆記3.2.10 Electrophilic Addition of Alkenes
Alkenes: Electrophilic Addition The double bond in alkenes is an area of high electron density (there are four electrons found in this double bond) This makes the double bond susceptible to attack ...
2022劍橋TMUA數學考試介紹，哪些學校和專業需要TMUA？
TMUA這兩年突然“異軍突起”，先是2021年劍橋宣布所有申請計算機科學的學生都要考 TMUA；再是今年劍橋砍掉 ECAA，改為 TMUA。可以說 TMUA 是這兩年劍橋最重視的考試了！連LSE 都官網鼓勵申請學生考TMUA。為什么TMUA...
CIE A Level Chemistry復習筆記3.2.9 Test for Unsaturation
Test for Unsaturation Halogens can be used to test if a molecule is?unsaturated?(i.e. contains a double bond) Br2(aq) is an orange or yellow solution, called?bromine water?and this is the halogen m...
CIE A Level Chemistry復習筆記3.2.8 Reactions of Alkenes
Reactions of Alkenes Alkenes are very useful compounds as they can undergo many types of reactions They can therefore be used as starting molecules when making new compounds Electrophilic addition ...
CIE A Level Chemistry復習筆記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復習筆記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復習筆記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復習筆記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...
