AQA A Level Chemistry复习笔记7.5.2 Basic Properties
Basic Properties The nitrogen atom in ammonia and amine molecules can accept a proton (H+ ion) They can therefore act as bases in aqueous solutions by donating its lone pair of electrons to ...
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ALevel CS大纲里要求我们掌握抽象和分解的概念，事实上，历年真题里也有很多反应这两种方法的题目，抽象和分解也是我们解决问题的一种思路，那么什么是抽象？什么是分解呢？ 什么是抽象？ 抽象是指看问题时过滤调...
AQA A Level Chemistry复习笔记7.4.3 Friedel–Crafts Acylation
Friedel–Crafts Acylation Arenes are very stable compounds due to the delocalisation of π electrons in the ring This is because the negative charge is spread out over the molecule instead of ...
AQA A Level Chemistry复习笔记7.4.2 Nitration of Benzene
Nitration The electrophilic substitution reaction in arenes consists of three steps: Generation of an electrophile Electrophilic attack Regenerating aromaticity Mechanism of electroph...
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AQA A Level Chemistry复习笔记7.3.6 Manufacture of Aspirin
Manufacture of Aspirin Manufacture of Aspirin Acylation reactions have many uses, such as in the pharmaceutical and textile industries for making drugs, e.g. aspirin, and textiles, e.g. cell...
AQA A Level Chemistry复习笔记7.3.5 Acylation
Acyl Groups Acyl groups Acyl groups can be built into many molecules using acyl chlorides or acid anhydrides (known as acylating agents) Acyl chlorides are derivatives of carboxylic acids by...
AQA A Level Chemistry复习笔记7.3.4 Ester Hydrolysis
Ester Hydrolysis Hydrolysis of Esters - Acid The reverse of the esterification reaction is called hydrolysis Ester hydrolysis is a useful reaction for creating biodegradable plastics Esters ...
AQA A Level Chemistry复习笔记7.3.3 Biodiesel
Biodiesel Biodiesel Biodiesel is made from renewable vegetable oils rather than non sustainable petrochemicals Natural triglyceride oils are converted to esters of methanol, which makes them...
AQA A Level Chemistry复习笔记7.3.2 Esters
Esters Esters Esters are a carboxylic acid derivative which contains the ester group, -COO- An ester is named after the parent carboxylic acid from which it is derived Remove the -oic acid suffix f...
AQA A Level Chemistry复习笔记7.2.3 Nucleophilic Addition
Nucleophilic Addition Many of the reactions which carbonyl compounds undergo are nucleophilic addition reactions The carbonyl group -C=O, in aldehydes and ketones is polarised The oxygen ato...
全球网络搜索量最多的10所英国大学！
英国有超过150所高等院校，你有没有想过，哪些大学是全球网络搜索量最多的？Erudera 团队对这个问题进行了研究，收集并分析了关于英国每所高等教育机构在互联网上的搜索次数的数据，得出了一份全球互联网搜索量最...
