Water is the most important chemical substance on earth. Water has specific chemical characteristics unlike other substances. One of these characteristics is its solubility.
Students build an understanding of solution concentration by varying amounts of solute,
solvent, and solution. Students can investigate which substance can have the largest concentration (solves best) even if they do not know the substance. This can be an introduction to a hands-on practical.
The students can observe the amount of mol/L (molecules that can be solved in one litre) and find out what saturated means? What can be observed when the solvent is saturated?
Download practical experiment on Solubility in water for primary school level.
Download practical on Solubility with the use of effervescent tablets.
Depending on how used the pupils are to carry out experiments, you can leave out some of the instructions (scaffolding). Purely inquiry-based would be:
- Find out how you can influence the degree of solubility in water using the effervescent tablets and water.
Whereby the pupils have to set up the experiment themselves, record the results, and write a conclusion.
See the blogpost Density and Buoyancy for buoyancy in water.