AQA A Level Chemistry复习笔记8.1.4 Entropy of Vaporisation
Entropy of Vaporisation The entropy change when water boils can be measured using a kettle and a top pan balance At the boiling point, liquid water and water vapour exist in equilibrium so t...
AQA A Level Chemistry复习笔记8.1.3 Required Practical 9
Required Practical 9 Required Practical 9: Investigating pH changes The experimental set up for measuring pH changes in titrations Steps in the procedure Measure out 50 cm3 of 1.0 mol...
AQA A Level Chemistry复习笔记8.1.2 Required Practical 8
Required Practical 8 Required Practical 8: Measuring the EMF of a cell To measure a cell EMF you will need Two small beakers, around 75 cm3 capacity Strips of suitable metals such as copper,...
AQA A Level Chemistry复习笔记7.11.5 Interpreting Chromatograms
Interpreting Chromatograms The less polar components travel further up the TLC plate Their Rf values are higher than those closer to the baseline They are more soluble in the mobile phase an...
AQA A Level Chemistry复习笔记7.11.4 Gas Chromatography
Gas Chromatography Gas-Liquid Chromatography (GLC) is used for analysing: Gases Volatile liquids Solids in their vapour form The stationary phase: This method uses a long coiled colum...
AQA A Level Chemistry复习笔记7.11.3 Column Chromatography
Column Chromatography Column Chromatography In column chromatography, the column is often a long vertical glass tube or in the laboratory a burette is suitable An inert solid (usually powder...
AQA A Level Chemistry复习笔记7.11.2 Thin Layer Chromatography
Thin Layer Chromatography Thin-layer chromatography (TLC) is a technique used to analyse small samples via separation For example, we could separate a dye out to determine the mixture of dye...
AQA A Level Chemistry复习笔记7.10.3 ¹³C NMR
¹³C NMR Nuclear Magnetic Resonance (NMR) spectroscopy is used for analysing organic compounds Atoms with odd mass numbers usually show signals on NMR For example, isotopes of atoms Many of t...
2022高考后澳洲本科留学详细指南！
高考成绩出炉了，面对这场千万人参加的大考，高考生面临的压力可想而知，不少学生和家长将目光投向更广阔的海外院校。澳洲拥有优质的环境和教育，以及灵活多样的本科入学方式，成为高考留学双保险的首选国家。 20...
AQA A Level Chemistry复习笔记7.10.2 ¹H NMR
¹H NMR Features of a 1H NMR spectrum NMR spectra shows the intensity of each peak against their chemical shift The area under each peak gives information about the number of protons in a par...
美国留学2022线上招生宣讲时间汇总！
每年申请季之初，很多美国大学都会举办招生宣讲会。近期，包括哈佛、MIT在内的美国TOP 30大学及文理学院公布了宣讲会的最新时间。下面我们就为大家汇总了一波美国留学2022线上招生宣讲时间及预约网址！一起来看一...
2023QS最佳留学城市：多所城市首次现身
如果你还没想好，可以看看QS最新发布的“2023年最佳留学城市排名”，2023年QS最佳留学城市排名中，参评城市数量空前，多所城市首次现身。快来根据排名，一起了解这些新上榜城市及其优势领域吧。 达勒姆 属地：美国 ...
