Analytical Techniques for Separating Substances

Analytical Techniques for Separating Substances

Task 1

Demonstrate use of scientific techniques to separate substances

1. Purifying an impure solid (alum) filtration and evaporation

2. Use about 3-4 of alum which is an impure solid

3. Add 25cm3 of water which is one-quarter full of the beaker

4. Place the beaker on a gauze and tripod, over a Bunsen burner. Stir the mixture with a glass rod while heating

5. Stop heating when the mixture boiled and allow it to cool a little

6. Filter the solution which is hot into the evaporating dish

7. Leave it to cool, and if…