Chemical Changes Required Practicals

Salts Practical

1
Equipment Setup

You will need: A beaker, Gauze, Tripod, Bunsen Burner, Heatproof Mat, Filter Paper, Evaporating Basin, Glass Rod

2
Making Copper Sulfate
  1. Pour Sulfuric Acid in to beaker
  2. Light the Bunsen Burner
  3. Add Copper Oxide to Sulfuric Acid
  4. Mix solution with a glass rod
Safety Concerns
  • Sulfuric Acid is corrosive
  • Take caution when using Bunsen Burner
  • Glass can smash
3
Completion of Reaction

Once solution turns blue and no more Copper Oxide will react, Copper Sulfate solution is formed.

4
Filtration
  1. Set up equiptment as shown
  2. Pour Copper Sulfate solution into filter paper to separate Copper Oxide from Copper Sulfate
5
Evaporation
  1. Set up equiptment as shown
  2. Pour Copper Sulfate solution into Evaporating Basin
  3. Turn on Bunsen Burner
  4. Heat until Copper Sufate solution halves
Safety Concerns
  • Risk of burns and fire from Bunsen Burner
6
Crystallisation
  1. Leave Evaporating Basin to cool until crystalls form



Titration (Neutralisation) Practical

1
Solution Transfer
  1. Using a pipette, transfer 25cm3 of Sodium Hydroxide Solution into a Conical Flask
Safety Concerns
  • Sodium Hydroxide is corrosive
2
Adding Indicator
  1. Add 5 drops of an indicator (such as Mythyl Orange or Phenolphthalein) to the Sodium Hydroxide solution
Setting up the microscope with prepared slide
3
Neutralisation
  1. Place Conical Fask on a White Tile. This will allow for easier observations of the incoming colour change
  2. Fill a Burette with Sulfuric Acid
  3. Slowly and carefully, allow the Burette to drip Sulfuric Acid into the conical flask until the start of a colour change is observed
  4. Once the colour changes, now add the acid drop by drop until the solution is neutral. If using methyl orange, the solution will turn red when neutral.
  5. Once neutral, stop adding acid. Record the volume of acid added from the Burette. Make sure to read from the meniscus.



Electrolysis Practical

1
Equipment Setup
  1. Take a beaker
  2. Add approximatley 50cm3 of Copper Chloride Solution to the Beaker
  3. Place a Petri Dish with two holes in it on top of the beaker
2
More Setup
  1. Insert 2 Carbon rods into the holes on the top of the Petri Dish
  2. Connect Crocodile Leads to the Carbon rods and a power supply
3
The Reaction
  1. Set the power supply to 4V and turn it on
  2. Observe electrodes. For this experiment, Chlorine gas will be produced at the anode and Copper will coat the cathode