IB DP Physics: HL复习笔记1.1.1 SI Units
SI Base Quantities International System (S.I.) Units There is a seemingly endless number of units in Physics These can all be reduced to seven base units from which every other unit can be derived ...
IB DP Chemistry: HL复习笔记21.1.3 Structure Identification Problems
Structure Identification Problems The chemists' toolkit includes a range of analytical techniques that enable the structure of compounds to be deduced Summary table of analytical techniques These t...
IB DP Chemistry: HL复习笔记21.1.2 X-Ray Crystallography
X-Ray Crystallography When visible light waves interact with objects the light is scattered, transmitted and reflected – this gives us information about the macroscopic world However, at the scale ...
IB DP Chemistry: HL复习笔记21.1.1 High Resolution NMR
High Resolution NMR In the first part of NMR spectroscopy, we have seen that the nuclei of H atoms behave as tiny magnets and can interact with an applied magnetic field Only atoms with odd mass nu...
IB DP Chemistry: HL复习笔记20.3.3 Optical Isomers
Optical Isomers Optical isomers A carbon atom that has four different atoms or groups of atoms attached to it is called a chiral carbon or chiral centre Chira comes from a Greek word meaning hand, ...
IB DP Chemistry: HL复习笔记20.3.2 Cis-Trans & E/Z Isomers
Cis-Trans & E/Z Isomers Configurational isomerism can be seen in unsaturated compounds, cyclic structures or compounds that contain at least one asymmetric carbon (sometimes called a chiral cen...
IB DP Chemistry: HL复习笔记20.3.1 Stereoisomers
Conformational & Configurational Isomers Isomers are compounds that have the same molecular formula but a different arrangement of atoms Isomers can be grouped into various categories, as shown...
IB DP Chemistry: HL复习笔记20.2.1 Synthesis
Organic Synthesis It is possible to make a large number of organic products from a few starting compounds and the necessary reagents and conditions Knowing how organic functional groups are related...
IB DP Chemistry: HL复习笔记20.1.4 Reduction Reactions
Reduction Reactions Carbonyl compounds Alcohols can be oxidised to carbonyl compounds in the presence of a suitable oxidising agent Primary alcohol → aldehyde → carboxylic acid Secondary alcohol → ...
