9701/42 · May/June 2024

Solubility of Group 2 sulfates, what controls lattice energy, and a Born-Haber cycle for potassium sulfide.

Decomposition of Group 1 nitrates, a manganate(VII) back-titration, and E⦵ values for the disproportionation of manganate(VI).

ΔG for burning carbon disulfide and the temperature at which a reaction stops being feasible.

Variable oxidation states, the shape of a d orbital, copper(II) complexes with ligands, why [Ag(NH₃)₂]⁺ is colourless, and stereoisomers of a ruthenium complex.

Finding a rate equation and rate constant from initial-rate data, and the mechanism of ozone breakdown.

Conjugate pairs and pKa, preparing an ethanoate buffer and its pH, and a fuel cell.

Synthesis of methyl red: nitration and directing effects, reducing a nitro group, diazotisation and coupling.

Basicity of phenylamine, benzylamine and ammonia, bromination, amides, isoelectric points and electrophoresis of amino acids.

Acidity of chlorinated acids, acyl chlorides from thionyl chloride, a polyester, and identifying a compound from tests and proton NMR.