Edexcel A Level Chemistry:復習筆記8.1.3 Rates of Reaction
Core Practical 13a: Titrimetric Methods The reaction between iodine in an acidic solution and propanone is CH3COCH3?(aq) + I2?(aq) →?CH3COCH2I?(aq) + H+?(aq) +?I-?(aq) We can follow the rate...
Edexcel A Level Chemistry:復習筆記8.1.2 Electrochemical Cells
Core Practical 10: Investigating Electrochemical Cells 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 suc...
Edexcel A Level Chemistry:復習筆記8.1.1 Finding Ka Values
Core Practical 9: Finding Ka for a Weak Acid The?Ka?of a weak acid may be determined by finding the pH at the half equivalence point At the half equivalence point?Ka?= [H+] Key steps in the ...
Edexcel A Level Chemistry:復習筆記7.7.5 Other Chromatography
Types of 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 (usual...
Edexcel A Level Chemistry:復習筆記7.7.4 Thin-Layer Chromatography
Thin Layer Chromatography Principles of Chromatography Chromatography is a technique that enables the separation of mixtures and includes: thin-layer chromatography (TLC) column chromatograp...
Edexcel A Level Chemistry:復習筆記7.7.3 Proton NMR
Proton NMR - Introduction Nuclear Magnetic Resonance (NMR)?spectroscopy is used for analysing organic compounds All samples are measured against a reference compound –?Tetramethylsilane (TMS) ?Tetr...
Edexcel A Level Chemistry:復習筆記7.7.2 Carbon-13 NMR
Using Carbon-13 Data 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 at...
英國學校開放申請了嗎？
準備留學英國的同學們都清楚，英國大學的錄取政策采用的是先到先得，擇優錄取的原則。那么每年的秋季大家都關注著英國學校開放申請了嗎？今天匯總下已經開放申請和可能提早截止的學校，希望給大家帶來一些幫助~ ...
Edexcel A Level Chemistry:復習筆記7.7.1 Mass Spectrometry
Using Mass Spectra At AS level, you have used mass spectrometry to determine: Relative atomic mass from isotopic abundance Possible molecular formulae from molecular ion peaks Organic struct...
Edexcel A Level Chemistry:復習筆記7.6.6 Organic Techniques - Purity
Melting & Boiling Point Determination Melting point determination The melting point of a solid is indicative of its purity and identity A melting point can be matched to a known substanc...
2023年ukcho競賽時間已開啟報名！牛劍G5申請者的必選化學競賽
化學愛好者心中的No.1—UKChO學術活動，能在該賽事中脫穎而出的同學，可大幅度提升申請牛劍G5的成功率。需要提醒的是，2023年ukcho學術活動時間已開啟報名！感興趣的同學一定要抓緊時間準備！報名通道已開啟，想要...
Edexcel A Level Chemistry:復習筆記7.6.5 Organic Techniques - Purification
Purification Methods There are different methods to purify organic compounds, including: Solvent extraction / use of a separating funnel Use of drying agents Recrystallisation Solvent extrac...
