IB DP Chemistry: HL复习笔记11.1.2 Mass Spectrometry
Determining Molecular Mass When a compound is analysed in a mass spectrometer, vaporised molecules are bombarded with a beam of high-speed electrons These knock off an electron from some of the mol...
IB DP Chemistry: HL复习笔记11.1.1 Index of Hydrogen Deficiency
Index of Hydrogen Deficiency The degree of unsaturation or index of hydrogen deficiency provides information about the number of double or triple bonds in a molecule The IHD is the number of hydrog...
IB DP Chemistry: HL复习笔记10.2.13 Reactions of Benzene
Reactions of Benzene Arenes are very stable compounds due to the delocalisation of π electrons in the ring This is because the electron density is spread out over the molecule instead of being conf...
IB DP Chemistry: HL复习笔记10.2.12 Halogenoalkanes
Reactions of Halogenoalkanes Halogenoalkanes are much more reactive than alkanes due to the presence of the electronegative halogens The halogen-carbon bond is polar causing the carbon to carry a p...
IB DP Chemistry: HL复习笔记10.2.11 Alcohols - Esterification
Esterification Esters are compounds with an -COOR functional group and are characterised by their sweet and fruity smells They are prepared from the condensation reaction between a carboxylic acid ...
英国大学关于AP考试取消的回复
前段时间的AP放榜可谓是几家欢喜几家愁，5分的成绩单满朋友圈的飞，翰林也发出了2022年AP年度盘点！翰林送出近2万元的5分奖学金！ 但还有很多同学依旧沉浸在AP考试被取消的阴影中。 受疫情的影响，今年5月上海、...
IGCSE课程难度如何？IGCSE六大学科难度盘点！
IGCSE课程难度如何？ 客观来说，这个问题无法一概而论。每个学科都有不同的课程体系和考试特点，我们还是要具体问题具体分析。 今天我们以CIE考试局为例，针对IGCSE几大热门学科，为大家做下全方位的难度解析。 ...
IB DP Chemistry: HL复习笔记10.2.10 Alcohols - Oxidation
Oxidation of Primary Alcohols The products of oxidation of alcohols depends on the class of alcohols Here is a reminder of the three classes of alcohols: The three classes of alcohols Primary alcoh...
AQA A Level Maths: Pure复习笔记3.1.3 Equation of a Straight Line
Equation of a Straight Line What is the equation of a straight line? y = mx + c is the equation for any straight line m is gradient given by “difference in y” ÷ “difference in x” or dy/dx c is the ...
