AQA A Level Chemistry復習筆記6.2.6 Redox Titrations
Redox Titrations Redox titration involves an?oxidising agent?being titrated against a?reducing agent Electrons are transferred from one species to another In acid-base titrations indicators ...
AQA A Level Chemistry復習筆記6.2.5 Variable Oxidation States
Variable Oxidation States The table below shows the most common oxidation states of a few transition metals Oxidation states of transition elements table When transition elements form...
AQA A Level Chemistry復習筆記 6.2.4 Formation of Coloured Ions
Colour in Transition Metal Ions Most transition element complexes are?coloured The transition metal ions can be identified by their colour The large variety of coloured compounds is a defini...
AQA A Level Chemistry復習筆記 6.2.3 Shapes of Complex Ions
Shapes of Complex Ions Depending on the?size of the ligands?and the?number of dative bonds?to the central metal ion, transition element complexes have different geometries Dative bonds can a...
AQA A Level Chemistry復習筆記 6.2.2 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 ...
AQA A Level Chemistry復習筆記 6.1.4 Oxides Reacting with Water
Oxides Reacting with Water Structure, bonding & electronegativity of the Period 3 elements table The oxides of?Na and Mg?which show purely?ionic bonding?produce?alkaline?solutions...
AQA A Level Chemistry復習筆記6.1.3 Melting Point Trend
Melting Point Trend The melting points of the oxides vary significantly across Period 3 and show a clear trend Melting point is a clear indication of the forces of attraction which exist bet...
AQA A Level Chemistry復習筆記6.1.2 Reaction with Oxygen
Reaction with Oxygen Oxide Formation The period 3 elements, excluding chlorine and argon, combine with oxygen to form oxides The oxide formed will contain the elements in their highest oxida...
A-Level經(jīng)濟學主要學習內(nèi)容，應該如何沖刺A*？
A-Level經(jīng)濟學Economics是A-Level最受學生歡迎的科目之一，但是很多學生認為A-Level經(jīng)濟學的學習難度較大、高分率低，“不選不行，選了痛苦”成為了很多選擇A-Level經(jīng)濟學學生的寫照。 A-Level經(jīng)濟學主要學習內(nèi)容 ...
