SOLUBILITY EXPERIMENT

SOLUBILITY EXPERIMENT

Aim:

To investigate the solubility of baking soda, table salt and copper oxide to see which is the most soluble

Equipment:

100mL beaker, 100mL measuring cylinder, salt, baking soda, copper oxide, stirring rod, spatula.

Method:

1. Fill the beaker with water
2. Add a spatula full of baking soda.
3. Stir the solution until it dissolves.
4. Repeat step 2 and 3 until no more will dissolve.
5. Record how many spatula fulls were added.
6. Repeat the experiment with salt and copper oxide.

Results:

Salt:18 heaps

Baking soda: 7 heaps

Copper Oxide:0 heaps

Discussion:
The salt was more soluble than the baking soda as when we dissolved the solute in the solvent we were able to dissolve more salt than the baking soda. The solution went clear after stirring each spatula full until no more would dissolve. The copper oxide turned the solution black and would not dissolve, hence the copper oxide is insoluble in water.

Conclusion:
This experiment showed that some solutes are more soluble than others in a solvent such as water. This also showed that some solutes are insoluble, meaning they do not dissolve.