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...
AQA A Level Chemistry复习笔记7.2.2 Reduction of Carbonyls
Reduction of Carbonyls Reduction of Carbonyls There are a large number of reducing agents which will reduce both an aldehyde and a ketone to an alcohol Aldehydes are reduced to primary alcoh...
AQA A Level Chemistry复习笔记7.1.3 Racemic Mixtures
Racemic Mixtures Net Optical activity Let’s suppose that in a solution, there is 20% of the enantiomer which rotates the plane polarised light clockwise and 80% of the enantiomer which rotat...
AQA A Level Chemistry复习笔记7.1.2 Identifying Chiral Centres
Identifying Chiral Centres Identifying chiral centres in a molecule takes a bit of practice whether it is from a formula, a 2D drawing or a 3D drawing To be successful you need to differenti...
热门专业A-Level选课推荐，附2022-2023 A-Level考试时间
A-Level课程，就是英国本土的高中课程。具有引进时间早、“能偏科”、“重刷题”的特点，是很多留学生的首选。 不过A-Level多达70多门课程，主要分为： 1.核心基础课程：主要有数学、物理、化学、生物、地理; 2.核心...
AQA A Level Chemistry复习笔记6.3.2 Reactions with Bases
Reactions with Bases The differences in the the chemistry of +2 and +3 aqua ions can be seen in their reactions with bases The reactions of iron(II), iron(III), copper(II) and aluminium with...
AQA A Level Chemistry复习笔记6.2.7 Catalysis
Catalysis Catalysts play an important part in industry allowing reactions to be carried out more quickly and at lower temperatures There are two types of catalysts, heterogeneous and homogen...
CAIE ALevel物理新大纲Astronomy & Cosmology公式！
CAIE剑桥国际考评中心ALevel物理（9702）从2022年起重新修改了考试大纲。A2部分新增了两大块儿全新的内容，PET scanning和Astronomy & Cosmology。今天带大家总结Astronomy & Cosmology部分的五个部分，...
AQA A Level Chemistry复习笔记6.2.6 Redox Titrations
Redox Titrations Redox titration involves an oxidising agent being titrated against a reducing agent Electrons are transferred from one species to another In acid-base titrations indicators ...
