Weakness and Remedies
The candidates’ weaknesses were evident in the following areas:
- determination of the volume of acid used;
- finding the average volume of acid used;
- calculation of concentration of ions present in the given volume of solution in moldm-3;
- finding the average volume of acid used, using the principle of concordance titres;
- use of wrong units.
- deducing correct inferences from the observations provided;
- inability to identify organic functional groups;
- inability to outline the techniques for the separation of a mixture of sugar and sand.
The following remedies were however suggested:
- teaching of volumetric analysis should not be limited to acid-base titration only, but be extended to redox titration;
- candidates should be familiar with the examination syllabus;
- candidates should improve on their study habit.