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...
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...
Edexcel A Level Chemistry:复习笔记7.6.1 Deducing Organic Structures
Deducing Organic Structures You will be expected to deduce the empirical, molecular and structural formulae of compounds from data such as: Combustion analysis Elemental percentage compositi...
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Edexcel A Level Chemistry:复习笔记7.5.7 Amino Acids & Proteins
Properties of 2-Amino Acids Acid / base properties of amino acids Amino acids will undergo most reactions of amines and carboxylic acids including acid-base reactions of: Amines with acids C...
