ALevel CS里的分解和抽象相關(guān)真題解析！
ALevel CS大綱里要求我們掌握抽象和分解的概念，事實上，歷年真題里也有很多反應(yīng)這兩種方法的題目，抽象和分解也是我們解決問題的一種思路，那么什么是抽象？什么是分解呢？ 什么是抽象？ 抽象是指看問題時過濾調(diào)...
AQA A Level Chemistry復(fù)習(xí)筆記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復(fù)習(xí)筆記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...
美國熱門大學(xué)ALevel換學(xué)分要求
在眾多家長學(xué)生眼里，A-Level申英國，AP申美國，八竿子打不著。 好吧，說個留學(xué)過期冷知識：A-Level，IB，AP都可以英美同申。而且A-Level可以在部分美國大學(xué)換分~ 事實上，A-Level課程的作用非常大，在美國和AP課...
AQA A Level Chemistry復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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...
