AQA A Level Chemistry复习笔记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复习笔记 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复习笔记 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复习笔记 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复习笔记 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复习笔记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复习笔记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...
AQA A Level Chemistry复习笔记5.6.5 Buffers
Acid & Basic Buffers A buffer solution is a solution which resists changes in pH when small amounts of acids or alkalis are added A buffer solution is used to keep the pH almost constant...
AQA A Level Chemistry复习笔记5.6.4 pH Curves
pH Curves During a titration a pH meter can be used and a pH curve plotted A pH curve is a graph showing how the pH of a solution changes as the acid (or base) is added The result is charact...
