Investigating Solubility

Aim:

To investigate the solubility of baking soda and table salt (sodium hydrogen carbonate and sodium chloride) and copper oxide to see which is most soluble.

Equipment:

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

Method:

1. Fill a 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/Discussion:

Copper oxide is insoluble, it doesn't dissolve.
Salt is soluble, it took 18 spatula fulls to dissolve into 40 ml of water,
Baking soda is soluble, it took 7 spatula fulls to dissolve into 40 ml of water

Conclusion:

When putting our solutes, the salt, soda and copper oxide, into our solvent, the water, we discovered which, out of the three, were soluble and were insoluble.