Edexcel A Level Chemistry:复习笔记7.7.2 Carbon-13 NMR
Using Carbon-13 Data Nuclear Magnetic Resonance (NMR) spectroscopy is used for analysing organic compounds Atoms with odd mass numbers usually show signals on NMR For example, isotopes of at...
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Edexcel A Level Chemistry:复习笔记7.7.1 Mass Spectrometry
Using Mass Spectra At AS level, you have used mass spectrometry to determine: Relative atomic mass from isotopic abundance Possible molecular formulae from molecular ion peaks Organic struct...
Edexcel A Level Chemistry:复习笔记7.6.6 Organic Techniques - Purity
Melting & Boiling Point Determination Melting point determination The melting point of a solid is indicative of its purity and identity A melting point can be matched to a known substanc...
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化学爱好者心中的No.1—UKChO学术活动，能在该赛事中脱颖而出的同学，可大幅度提升申请牛剑G5的成功率。需要提醒的是，2023年ukcho学术活动时间已开启报名！感兴趣的同学一定要抓紧时间准备！报名通道已开启，想要...
Edexcel A Level Chemistry:复习笔记7.6.5 Organic Techniques - Purification
Purification Methods There are different methods to purify organic compounds, including: Solvent extraction / use of a separating funnel Use of drying agents Recrystallisation Solvent extrac...
Edexcel A Level Chemistry:复习笔记7.6.4 Organic Techniques - Preparation
Distillation & Refluxing Simple distillation Simple distillation is a common practical completed in organic chemistry It is used as there are times that a reaction does not go to complet...
Edexcel A Level Chemistry:复习笔记7.6.3 Increasing Chain Length
Grignard Reagents If we need to increase the chain length we can use Grignard reagents Preparing Grignard reagents A halogenoalkane is dissolved in dry ether and reacted with magnesium to p...
Edexcel A Level Chemistry:复习笔记7.6.2 Planning Reaction Schemes
Planning Reaction Schemes A large number of organic products are made from a few starting compounds using appropriate reagents and conditions Knowing how organic functional groups are relate...
