For a dissolving test to be fair, the same amount of each substance being tested, and the same amount of water need to be used. The amount of a substance that dissolves in a certain amount of water is ...

Each different substance has a different solubility. This table shows the solubility of substances in water at 20°C. Solubility is shown as the grams of a solute per 100 g of water.

When one of the cups is then cooled down, some of the sugar recrystallises, demonstrating that the solubility of most solids increases with temperature. But most gases become less soluble at ...