Edexcel A Level Chemistry:复习笔记6.3.1 Vanadium
Colours & Oxidation States Vanadium is a transition metal which has variable oxidation states The table below shows the important ones you need to be aware of Addition of zinc to the van...
Edexcel A Level Chemistry:复习笔记6.2.12 Autocatalysis
Manganese(II) ions as an Autocatalyst Autocatalysis the term used to describe a reaction which is speeded up by a product which acts as a catalyst for the reaction If you plot a rate graph o...
Edexcel A Level Chemistry:复习笔记6.2.11 Homogeneous Catalysis
Homogeneous Catalysts Homogeneous catalyst is in the same physical state (phase) as the reactants This means they are either all gases, or more often, all in aqueous solution Homogenous cata...
Edexcel A Level Chemistry:复习笔记6.2.10 Heterogeneous Catalysis
Heterogeneous Catalysts A heterogeneous catalyst is in a different physical state (phase) from the reactants Heterogeneous catalysts are usually solids whereas the reactants are gaseous or i...
Edexcel A Level Chemistry:复习笔记6.2.9 Catalysis
Properties of Catalysts Transition metals are often used as catalysts in the elemental form or as compounds The ability of transition metals to form more than one stable oxidation state mean...
Edexcel A Level Chemistry:复习笔记6.2.8 Haemoglobin
Haemoglobin Haemoglobin is one of nature's complexes using a transition metal ion The haem molecule is a complex with iron(II) at its centre The haemoglobin complex contains a multidentate l...
Edexcel A Level Chemistry:复习笔记6.2.7 Cis-platin
Cis-platin Sometimes, complexes with four coordinate bonds may adopt a square planar geometry instead of a tetrahedral one Cyanide ions (CN-) are the most common ligands to adopt this geomet...
Edexcel A Level Chemistry:复习笔记6.2.6 Tetrahedral Complexes
Tetrahedral Complexes When there are four coordinate bonds the complexes often have a tetrahedral shape Complexes with four chloride ions most commonly adopt this geometry Chloride ligands a...
Edexcel A Level Chemistry:复习笔记6.2.5 Octahedral Complexes
Octahedral Complexes Octahedral complexes are formed when a central metal atom or ion forms six coordinate bonds This could be six coordinate bonds with six small, monodentate ligands Exampl...
