Making Salts RQ

Making Soluble Salts

EQUIPMENT LIST (APPARATUS)

● 1.0 M dilute sulfuric acid

● Copper (II) oxide powder

● A spatula

● A glass rod

● A measuring cylinder

● Bunsen burner

● Tripod

● Gauze

● Heatproof mat

● Filter funnel and paper

● A small conical flask

● An evaporating basin

● A crystallising dish
METHOD
1. Measure 20 cm3 sulfuric acid (the limiting reactant) into a measuring cylinder and pour it into the beaker 

2. Heat the acid gently using a Bunsen burner until it is almost boiling

3. Using a spatula, add small amounts of copper oxide in the acid
4. Stir the solution with a glass rod and keep adding small amounts of copper oxide until no more reactions with copper oxide take place, meaning no more effervescence is produced. Stop adding copper oxide if power remains after stirring.

5. Use filtration to remove excess copper oxide, by using a filter paper, funnel and conical flask. Put filter paper on funnel and place funnel on conical flask to pour the solution, to get excess copper oxide.

6. Pour the solution into the evaporating basin.

7. Place the solution above a beaker full of boiling water and place the beaker above the bunsen burner. Heat until around half of the solution remains. 

8. Leave the evaporating basin in a cool place for at least 24 hours.

9. Gently pat the crystals dry between two pieces of filter paper