The following statement describes the assessable content for this sub-section, as described in the SQA arrangement documents.
|Volumetric analysis involves using a solution of accurately known concentration in a quantitative reaction to determine the concentration of another substance. A solution of accurately known concentration is known as a standard solution. The volume of reactant solution required to complete the reaction is determined by titration. The "end point" is the point at which the reaction is just complete. An indicator is a substance which changes colour at the end-point. Redox titrations are based on redox reactions. Substances such as potassium manganate (VII) which can act as their own indicators are very useful reactants in redox titrations. The concentration of a compound can be calculated from experimental results by use of a balanced equation.|
Resources on other websites
- Aspirin: a curriculum resource for post-16 chemistry and science courses
- Aimed at post-16 students in chemistry, contains eight free-standing activities that can be used singly or as a coherent package in a wide range of teaching and learning situations for both academic and vocational courses.
- Which fruit contains the most vitamin C? What conditions affect the amounts of vitamin C?
A practical activity in which students compare the amounts of vitamin C present in a variety of fresh fruit and fruit juices. In groups they analyse different samples and then compile a full set of class results.
- Oranges and lemons
- An activity which sets learners the task of comparing the acid content of an orange and an apple.