AS & A Level Chemistry (9701) — October–November 2023, Paper 42

Propanone, CH₃COCH₃, reacts with iodine, I₂, in the presence of an acid catalyst: CH₃COCH₃ + I₂ → CH₃COCH₂I + H⁺ + I⁻. The rate equation for this reaction is rate =…

Benzoic acid, C₆H₅COOH, is a weak acid; the Ka of benzoic acid is 6.31 × 10⁻⁵ mol dm⁻³ at 298 K. A 1.00 dm³ buffer solution is made at 298 K containing 1.00 g of C₆H₅COOH and a…

Some electrode potentials are shown in Table 3.1 (including V²⁺/V −1.20 V, V³⁺/V²⁺ −0.26 V, VO²⁺/V³⁺ +0.34 V, VO₂⁺/VO²⁺ +1.00 V, Fe²⁺/Fe −0.44 V, Fe³⁺/Fe −0.04 V, Fe³⁺/Fe²⁺ +0.77…

The structure of the polydentate ligand EDTA⁴⁻ is shown in Fig. 4.1 (a hexadentate ligand with two N atoms and four carboxylate O donor atoms). The stability constants at 298 K of…

Some of the ionic compounds of Group 2 elements undergo thermal decomposition. Thermal decomposition of solid anhydrous magnesium ethanedioate, MgC₂O₄, occurs above 650 °C; the…

Phosphine, :PH₃, and carbon monoxide, :CO, are monodentate ligands found in some transition element complexes. Define monodentate ligand.

Benzene can be used to make benzoic acid in a two-step process (Fig. 7.1): benzene → (step 1) methylbenzene → (step 2) benzoic acid. Give the reagents and conditions for step 1…

Lactic acid, CH₃CH(OH)COOH, is the only monomer needed to form the polymer polylactic acid, PLA. Draw a short length of the PLA polymer chain, including a minimum of two monomer…

State the reactants and conditions for two different types of reactions that both produce diethylamine, CH₃CH₂NHCH₂CH₃.