AQA A Level Chemistry复习笔记8.1.5 Iodine Clock Reaction
Iodine Clock Reaction Clock reactions are so called because they show a sharp dramatic colour change after a period of time has elapsed They make ideal reactions for studying kinetics Iodine...
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...
