Experimental Chemistry structured questions · SEC G3 Combined Science Chemistry component

Learning objectives

• name appropriate apparatus for the measurement of time, temperature, mass and volume; including burettes, pipettes, measuring cylinders and gas syringes
• suggest suitable apparatus, given relevant information, for a variety of simple experiments, including collection of gases and measurement of rates of reaction.
• describe methods of separation and purification for the components of mixtures, to include: — use of a suitable solvent, filtration and crystallisation or evaporation
• describe methods of separation and purification for the components of mixtures, to include: — distillation and fractional distillation (see also 11.1(b))
• describe methods of separation and purification for the components of mixtures, to include: — paper chromatography
• suggest suitable separation and purification methods, given information about the substances involved in the following types of mixtures: — solid-solid
• suggest suitable separation and purification methods, given information about the substances involved in the following types of mixtures: — solid-liquid
• suggest suitable separation and purification methods, given information about the substances involved in the following types of mixtures: — liquid-liquid (miscible)
• interpret paper chromatograms including comparison with ‘known’ samples (the use of Rf values is not required)
• deduce from given melting point and boiling point data the identities of substances and their purity.
• follow a sequence of instructions;
• use techniques, apparatus and materials;
• make and record observations, measurements and estimates;
• interpret and evaluate observations and experimental results;
• plan investigations, select techniques, apparatus and materials;
• evaluate methods and suggest possible improvements.