Suggest an activity to show that solubility of salt depends on temperature?

Question

Short activities

Answer 1

1) Pour 100ml of H2O at 20 deg into a beaker
2)add salt 5g at a time stirring until salt will no longer dissolve (write down how much salt was used)
3) pour 100ml H2O @ 40-50deg into a beaker
4i)add same amount of mass of salt
(it will now dissolve, thus demonstrating that solubility of salt is dependant on temperature)
4ii)or add salt 5g at a time stirring untill salt will no longer dissolve (write down how much salt was dissolved)
5)compare amounts of salt from 2 and 4ii, if 4ii dissolved more then solubility is temperature dependant.

Answer 2

Dissolve maximum soluble amount of salt in boiling water. Filter while hot to get a pure very hot salt solution. Allow it to cool . While the salt water cools, a lot of salt collects like a sediment at the bottom. Needless to say you must use only a transparent container while cooling. Add a few ice cubes and cool further. Some more salt come down to bottom. This proves more salt is soluble in boiling water than water at room temperature.And cool water dissolves minimum salt

Answer 3

take some water in a container and add some salt in it till the solution saturates. now heat the water you will find that more salt can be dissolved in this water. now cool this water . as you will cool the water crystals of extra salt will be formed. this proves that it depends on temprature.