AQA A Level Chemistry復習筆記3.3.3 Ozone Depletion
Uses Fluorohalogenoalkanes The most common?halogenoalkanes?are?chlorofluorocarbons?(CFCs) These compounds contain carbon atoms with chlorine and fluorine atoms attached to them E.g. CCl3F an...
AQA A Level Chemistry復習筆記3.3.2 Reactions of Halogenoalkanes
The Key Reactions of the Halogenoalkanes Types of Reactions that halogenoalkanes undergo: Halogenoalkanes?are much more reactive than alkanes due to the presence of the?electronegative?halog...
AQA A Level Chemistry復習筆記3.2.4 Chlorination of Alkanes
Free Radical Substitution ?Free-radical substitution of alkanes Alkanes can undergo?free-radical substitution?in which a hydrogen atom gets?substituted?by a halogen (chlorine/bromine) Since ...
AQA A Level Chemistry復習筆記3.2.3 Combustion of Alkanes
Combustion Alkanes are?combusted?(burnt) on a large scale for their use as fuels Complete combustion When alkanes are burnt in?excess?(plenty of) oxygen,?complete combustion?will take place ...
AQA A Level Chemistry復習筆記3.2.2 Modification of Alkanes by Cracking
Cracking Alkanes?are hydrocarbons that can be produced by the?addition?reaction?of hydrogen to an alkene or by?cracking?of longer alkane chains Crude oil Crude oil is a?mixture?of hydrocarbo...
AQA A Level Chemistry復習筆記3.1.5 Stereoisomerism
Stereoisomerism: Geometrical Isomerism Stereoisomers?are compounds that have the same atoms connected to each other, however the atoms are differently arranged in space There are two types o...
AQA A Level Chemistry復習筆記3.1.4 Structural Isomerism
Molecules: Straight, Branched & Cyclic Straight, branched and cyclic organic molecules are also called?aliphatic?compounds as long as they do not contain a?benzene ring Straight-chain St...
AQA A Level Chemistry復習筆記3.1.3 Nomenclature
Nomenclature Systematic nomenclature?can be used to name organic compounds and therefore make it easier to refer to them The?alkanes?provide the basis of the naming system and the?stem?of ea...
AQA A Level Chemistry復習筆記3.1.2 Types of Formulae
Types of Formulae The?general formula?is a formula that represents a?homologous series?of compounds using letters and numbers Eg. the general formula of alkanes is CnH2n+2 A homologous serie...
AQA A Level Chemistry復習筆記2.3.4 Uses & Reactions of Chlorine
Reactions of Halide Ions A?disproportionation?reaction?is a reaction in which the same species is both oxidised and reduced The reaction of?chlorine?with?dilute alkali?is an example of a dis...
AQA A Level Chemistry復習筆記2.3.3 Testing for Halide Ions
Testing for Halides Silver ions & ammonia Halide ions can be identified in an?unknown?solution?by dissolving the solution in?nitric acid?and then adding?silver nitrate solution dropwise ...
斯坦福及藤校新生成績分布！美國TOP大學偏好錄取什么成績的學生？
美國大學入學人數跌破記錄了！ 明明申請競爭那么激烈， 到底是什么情況？ 據美國國家學生信息中心（National Student Clearinghouse Research Center）最新數據顯示：2022年春季本科入學人數相較去年減少了66.2萬...
