Edexcel A Level Chemistry:復習筆記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:復習筆記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:復習筆記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...
2023年ukcho競賽時間已開啟報名！牛劍G5申請者的必選化學競賽
化學愛好者心中的No.1—UKChO學術活動，能在該賽事中脫穎而出的同學，可大幅度提升申請牛劍G5的成功率。需要提醒的是，2023年ukcho學術活動時間已開啟報名！感興趣的同學一定要抓緊時間準備！報名通道已開啟，想要...
Edexcel A Level Chemistry:復習筆記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:復習筆記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:復習筆記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:復習筆記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...
