Precipitation & Ligand Substitution (AQA)

Transition Metals & Reactions of Ions in Aqueous Solution

9 Full Lesson Bundle covering **Transition Elements & Reactions of Ions in Aqueous Solution** from AQA A Level Chemistry. Please review the learning objectives below: **Lesson 1: The General Properties of Transition Metals** 1. To know the electron configuration of atoms and ions of the d-block elements of Period 4 (Sc–Zn), given the atomic number and charge 2. To understand the elements Ti–Cu as transition elements 3. To illustrate, using at least two transition elements, of: (i) the existence of more than one oxidation state for each element in its compounds (ii) the formation of coloured ions (iii) the catalytic behaviour of the elements and their compounds and their importance in the manufacture of chemicals by industry (iv) Formation of complex ions **Lesson 2: Transition Metals and Complex Ions** 1. To explain and use the term ligand in terms of dative covalent bonding to a metal ion or metal, including bidentate ligands 2. To use the terms complex ion and coordination number 3. To understand what the chelate effect is. 4. To construct examples of complexes with: (i) six-fold coordination with an octahedral shape (ii) four-fold coordination with either a planar or tetrahedral shape (iii) two-fold coordination with a linear shape **Lesson 3: Stereoisomerism in Complex Ions** To understand the types of stereoisomerism shown by metal complexes, including: 1. Cis-trans isomerism in square planar complexes 2. Cis–trans isomerism in octahedral complexes with monodentate and bidentate ligands 3. Optical isomerism in octahedral complexes with bidentate ligands **Lesson 4: Colour in Complex Ions** 1. To describe the origin of colour of a transition metal complex ion 2. To explain what factors determine the colour of a complex ion 3. To calculate △E using △E = hv and equivalent equations **Lesson 5: Precipitation & Ligand Substitution** 1. Describe precipitation and ligand substitution reactions of Co2+ and Cu2+ ions 2. Explain why ligand substitution reactions involving chloride ligands involve a change in coordination number 3. Explain the chelate effect, in terms of the balance between the entropy and enthalpy change **Lesson 6: Acid-base chemistry of iron and aluminium ions** 1. Describe how metal aqua ions are formed 2. Describe and explain the simple test-tube reactions of: Fe2+ , Fe3+ and Al3+ with bases 3. Explain why the acidity of [M(H2O)6]3+ is greater than that of [M(H2O)6]2+ **Lesson 7: Redox Titrations (Part 1)** 1. To understand what a redox titration is 2. To calculate titration questions based on experimental results involving Fe2+ /MnO4- 3. To calculate titration questions based on experimental results involving Fe2+ /Cr2O72- **Lesson 8: Redox Titrations (Part 2)** 1. To calculate titration questions based on experimental results involving C2O42-/MnO4- 2. To calculate titration questions based on experimental results of non familiar redox systems 3. To understand the factors that affect the electrode potential of transition metal ions and to predict the direction of redox reactions (synoptic link to electrode potentials and electrochemical cells) **Lesson 9: Catalysis** 1. State what is meant by homogeneous and heterogeneous catalysts 2. Explain, with the aid of equations, how homogeneous catalyst (V2O5) and heterogeneous catalyst (Fe2+) catalyse reactions 3. Explain, with the aid of equations, how Mn2+ ions autocatalyse the reaction between C2O4 2– and MnO4 –