Chemistry 9701/31 May June 2022 | Cambridge AS Level Past Papers With Mark Scheme

1. Preparation of 0.200 mol/dm³ NaCl solution, including mass calculation, weighing by difference, and transferring to a beaker.
2. Performing a titration to determine the molar ratio of sodium hydroxide and carboxylic acid, including calculations and identification of the carboxylic acid.
3. Conducting titrations with aminoethanoic acid, analyzing titre differences, and comparing it with the carboxylic acid in FA 1.
4. Identifying magnesium compounds by thermal decomposition, calculating the mass of magnesium oxide, and deducing the formula of the decomposition product.
5. Performing a qualitative analysis to identify anions and functional groups, including reactions with sodium hydroxide, barium chloride, and other reagents.