Chemistry 9701/42 May June 2022 | Cambridge AS Level Past Papers With Mark Scheme

1. Explanation of the trend in solubility of Group 2 hydroxides and related calculations for the solubility product (Ksp) of Be(OH)2.
2. Understanding complex ions, their structures, and hybridization, with examples like [Be(OH)4]2- and related shapes.
3. Discussion of transition elements and their ability to form complex ions, with specific examples and coordination numbers.
4. Understanding stability constants, Kstab, and calculations involving equilibrium constants for complex ions like [Ni(en)3]2+ and [Ni(tn)3]2+.
5. Explanation of transition elements' variable oxidation states and their effect on color and bonding in compounds.
6. Analysis of the physical properties and bonding in various Period 3 chlorides, including reactions with water and changes in temperature.