Edexcel A Level Chemistry:復習筆記6.3.2 Chromium
Reduction & Oxidation of Chromium Species For chromium we need to consider the following standard electrode potential values We will use zinc and hydrogen peroxide as oxidising agents Th...
Edexcel A Level Chemistry:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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...
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