CIE A Level Chemistry复习笔记6.3.3 Redox Systems
Redox Systems: Ferrous & Permanganate The oxidation states of transition element ions can change during redox reactions A species will either be oxidised or reduced, depending on what reaction ...
CIE A Level Chemistry复习笔记6.3.2 Predicting Feasibility of Redox Reactions
Feasibility of Redox Reactions Using Standard Electrode Values Transition elements can form ions with various oxidation states The change in their oxidation states involves the transfer of electron...
CIE A Level Chemistry复习笔记6.3.1 Ligand Exchange
Ligand Exchange Ligand exchange (or ligand substitution) is when one ligand in a complex is replaced by another Ligand exchange forms a new complex that is more stable than the original one The lig...
CIE A Level Chemistry复习笔记6.2.8 Coloured Complexes
Coloured Compounds & Electron Promotion Most transition element complexes are coloured A transition element complex solution which is coloured, absorbs part of the electromagnetic spectrum in t...
CIE A Level Chemistry复习笔记6.2.7 Degenerate & non-Degenerate d Orbitals
Define Degenerate & non-Degenerate d Orbitals There are five d orbitals in an isolated transition element atom or ion An isolated transition element is one that is not bonded to anything else T...
CAIE A-Level成绩放榜，各科目分数线已出！
CAIE剑桥国际考评部已经于2022年8月11日公布了今年夏季Alevel大考成绩。已经查到成绩的同学们都考得怎么样呢？都考到了目标分数了吗？ 虽然今年国内部分地区因为疫情采用了POE的评分方式，但大部分同学还是参加了...
CIE A Level Chemistry复习笔记6.2.6 Geometry of Complexes
Geometry of the Transition Element Complexes Depending on the size of the ligands and the number of dative bonds to the central metal ion, transition element complexes have different geometries Dat...
CIE A Level Chemistry复习笔记6.2.5 Defining Complexes
Define Complex A complex is a molecule or ion formed by a central metal atom or ion surrounded by one or more ligands A ligand is a species that contains one or more lone pairs of electrons The lig...
CIE A Level Chemistry复习笔记6.2.4 Ligands
Define Ligand A ligand is a molecule or ion that has one or more lone pairs of electrons These lone pairs of electrons are donated by the ligand, to form dative covalent bonds to a central metal at...
