Chemistry 9701/42 March 2022 | Cambridge AS Level Past Papers With Mark Scheme
1. NaCl solution: 0.200 mol/dm³, mass calculation, weighing by difference, transferring to beaker.
2. Titration: sodium hydroxide, carboxylic acid, molar ratio, calculations, identification of carboxylic acid.
3. Titration: aminoethanoic acid, titre differences, comparison with FA 1 carboxylic acid.
4. Magnesium compounds: thermal decomposition, magnesium oxide mass, decomposition product formula.
5. Qualitative analysis: anion identification, functional groups, reactions with sodium hydroxide, barium chloride.

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