The Chemist's tools 9.1.3 - The observations circus
Matter: states and properties of matter.
Particle/kinetic theory, diffusion.
Pure and impure substances. Types of mixtures (solutions, oils, alloys, emulsions)
Separation techniques, including filtration, distillation [including crude oil - myp10], chromatography.
Activity - Qualitative observation:
Experimentation and instrumentation
The most important (but certainly not the most accurate) tools are our own senses, however these cannot be used empirically.
Student follow up
The experiments should be written up as a lab report and evidence for the chemical or physical nature of the reactions identified. An overall conclusion as to the ease of identifying by evidence should be included as well as an evaluation of the effectiveness of the experiment circus.
The sulfur experiment should be carried out in the fume cupboard.
Iodine finger may be placed in a beaker of sodium thiosulfate after the reaction is observed
Heat proof mats should be supplied for the iron nail