Edexcel A Level Chemistry:复习笔记3.6.1 Mass Spectrometry
Mass Spectrometry Mass spectroscopy is an analytical technique used to identify unknown compounds The molecules in the small sample are bombarded with high energy electrons which can cause t...
Edexcel A Level Chemistry:复习笔记3.5.3 Organic Liquid Preparation & Purification
Organic Liquid Preparation & Purification Simple Distillation This is used to separate a liquid and soluble solid from a solution (e.g. water from a solution of salt water) or a pure liq...
Edexcel A Level Chemistry:复习笔记3.5.2 Reactions of Alcohols
Reactions of Alcohols Combustion of alcohols Alcohols react with oxygen in the air when ignited and undergo complete combustion to form carbon dioxide and water alcohol + oxygen → carbon dio...
Edexcel A Level Chemistry:复习笔记3.5.1 Classifying Alcohols
Classifying Alcohols Alcohols are a family of molecules that contain the hydroxyl functional group, -OH Their general formula is CnH2n+1OH The nomenclature of alcohols follows the pattern a...
Edexcel A Level Chemistry:复习笔记3.4.5 Reactivity of Halogenoalkanes
Reactivity of Halogenoalkanes Nucleophilic substitution reactions can occur in two different ways (known as SN2 and SN1 reactions) depending on the structure of the halogenoalkane involved T...
Edexcel A Level Chemistry:复习笔记3.4.4 Hydrolysis of Halogenoalkanes
Relative Rates of Hydrolysis Measuring the rate of hydrolysis Acidified aqueous silver nitrate can be used to measure the rate of hydrolysis of halogenoalkanes The following method is used: ...
Edexcel A Level Chemistry:复习笔记3.4.3 Nucleophilic Substitution Mechanism
Nucleophilic Substitution: Mechanisms A nucleophilic substitution reaction is one in which a nucleophile attacks a carbon atom which carries a partial positive charge An atom that has a part...
Edexcel A Level Chemistry:复习笔记3.4.2 Nucleophilic Substitution
Nucleophilic Substitution: Reactions A nucleophile is an electron-rich species that can donate a pair of electrons ‘Nucleophile’ means ‘nucleus / positive charge loving’ as nucleophiles are ...
Edexcel A Level Chemistry:复习笔记3.4.1 Classifying Halogenoalkanes
Classifying Halogenoalkanes Naming halogenoalkanes We use the prefixes Fluoro for fluorine Chloro for chlroine Bromo for bromine Iodo for iodine The name of the halogenoalkane is based on th...
Edexcel A Level Chemistry:复习笔记3.3.7 Waste Polymers
Disposal of Polymers Polymers provide a readily available, cheap alternative to many metal, glass, paper and cardboard materials in everyday use The low reactivity of many polymers makes the...
Edexcel A Level Chemistry:复习笔记3.3.6 Addition Polymerisation
Addition Polymerisation Addition polymerisation Addition polymerisation is one of the most important addition reactions of alkenes which form the basis of the plastics industry Addition poly...
epq课程对申请真的有用吗？Alevel加分的高人气选项
近几年，随着英本申请越来越“卷”，很多学生除了铆足劲提升学术成绩，还把目光转向了学术背景的提升。于是，EPQ项目就成为了家长和学生眼中的“最优选项”。epq课程对申请真的有用吗？一起来看看吧。 以往，一部分同...
