2022AP成绩即将出分，如何查分/送分/复议/取消/隐藏？
2022 AP考试成绩将在7月5日全球同步发送，每位考生可以通过自己的AP学生账号在线查询成绩。但拿到考试成绩不是终点，还需要留意后续的成绩相关流程。 接下来这篇文章会针对同学关心的问题：查分/送分/复议/取消/...
AQA A Level Chemistry复习笔记8.3.4 Required Practical 12
Separation of species by TLC Required practical 12: Separation of species by thin-layer chromatography This practical covers two key laboratory skills use thin-layer or paper chromatography safely ...
AQA A Level Chemistry复习笔记8.3.3 Testing Aldehydes & Ketones
Tollens' Reagent Testing Distinguishing Between Aldehydes & Ketones Weak oxidising agents can be used to distinguish between an aldehyde and a ketone The aldehyde will be oxidised to a c...
AQA A Level Chemistry复习笔记8.3.2 Required Practical 10b
Preparation of an Ester This required practical covers the following mandatory skills use water bath or electric heater or sand bath for heating use laboratory apparatus for a variety of exp...
AQA A Level Chemistry复习笔记8.2.9 Reactions of Metal-Aqua Ions
Reactions of Metal-Aqua Ions In this practical activity, test tube reactions of copper(II), iron(II), iron(III) and aluminium ions with three bases are investigated 10 drops of the metal-aqu...
AQA A Level Chemistry复习笔记8.2.8 Identifying Ions
Identifying Ions Testing for positive ions Simple test tube reactions can be done to identify the following positive ions: Group 2 ions (M2+) Ammonium ions (NH4+) If the sample to be ...
AQA A Level Chemistry复习笔记8.2.7 Autocatalysis Experiments
Autocatalysis Experiments Autocatalysis Experiment - Titration with sodium thiosulfate Autocatalysis occurs when one of the products catalyses the reaction Potassium manganate(VII) will reac...
AQA A Level Chemistry复习笔记8.2.6 Colorimetry & Complex Ions
Colorimetry & Complex Ions Colorimetry & Complex Ions Colorimetry can be used to measure the absorption of radiation using a colorimeter This uses a lamp as a source of white light, ...
AQA A Level Chemistry复习笔记8.2.5 Vanadium Oxidation States
Vanadium Oxidation States Vanadium Oxidation States Vanadium is a transition metal which has variable oxidation states Vanadate(V) ions can be reduced to oxidised vanadium species with the o...
