爱德思公布11月GCSE秋考预先信息
今年5-6月大考成绩将在8月中旬前后放榜,在等待出分之前,很多考生早已投入到紧张的备考当中。 与此同时,爱德思考试局也发布了针对秋季大考的预先信息(Advance Information),正在备考的小伙伴过来划重点啦~ 0...
今年5-6月大考成绩将在8月中旬前后放榜,在等待出分之前,很多考生早已投入到紧张的备考当中。 与此同时,爱德思考试局也发布了针对秋季大考的预先信息(Advance Information),正在备考的小伙伴过来划重点啦~ 0...
Edexcel IGCSE Chemistry 复习笔记 4.8.3 Condensation Polymers Condensation Polymers Condensation polymers are formed when two different monomers are linked together with the removal of a smal...
Edexcel IGCSE Chemistry 复习笔记 4.8.2 Disposal of Addition Polymers Disposal of Addition Polymers Addition polymers are formed by the joining up of many small molecules with strong C-C bond...
Edexcel IGCSE Chemistry 复习笔记 4.8.1 Addition Polymers Monomers Polymers are large molecules of high relative molecular mass and are made by linking together large numbers of smaller molec...
Edexcel IGCSE Chemistry 复习笔记 4.7.2 Practical: Preparation of Ethyl Ethanoate Practical: Preparation of Ethyl Ethanoate Aim: To prepare a small sample of ethyl ethanoate Diagram: &...
Edexcel IGCSE Chemistry 复习笔记 4.7.1 Esters The Esters Making Esters Alcohols and carboxylic acids react to make esters in esterification reactions Esters are compounds with the functional...
Edexcel IGCSE Chemistry 复习笔记 4.6.2 Reactions of Carboxylic Acids Reactions of Carboxylic Acids The carboxylic acids behave like other acids They react with metals to form a salt and hydr...
Edexcel IGCSE Chemistry 复习笔记 4.6.1 Carboxylic Acids The Carboxylic Acids Carboxylic acids is the name given to compounds containing the functional group carboxyl, -COOH The general formu...
Edexcel IGCSE Chemistry 复习笔记 4.5.3 Manufacture of Ethanol Industrial Synthesis of Ethanol Ethanol can be synthesised by the hydration of ethene Ethene is a by-product of the cracking of ...
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