哈佛大學2022推薦書單，10本電子書免費領！
開學季來臨！大家是不是“書荒”了呢？ 哈佛大學發布2022暑期書單 各學院教授每年都會推薦一些經典讀物 相信每位同學都能 在這個列表中找到喜歡的那本書！ www.harvard.edu/in-focus/summer-reads/book-recommendat...
Edexcel A Level Chemistry:復習筆記3.6.2 Infrared (IR) Spectroscopy
Interpreting an IR Spectrum Infrared (IR) spectroscopy?is a technique used to identify compounds based on changes in?vibrations?of atoms when they?absorb?IR of certain?frequencies A?spectrop...
Edexcel A Level Chemistry:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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...
