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...
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关注PBL赛事的家长和同学，CTB这个赛事对大家应该并不陌生。China Thinks Big（简称CTB），由哈佛商学院和清华大学经管学院学者联合启动，是以学术研究和社会实践推动社会创新的国际高中生创新活动。 参加过CTB的...
