Synthesis of Barium Sulphate (BaSO4)
1. Experiment Details
Experiment Title: Synthesis of Barium Sulphate (BaSO4)
2. Data-Time Group (DTG)
3. Aim
To produce a pure sample of Barium Sulphate (BaSO4) of at least 0.50
grams.
4. Apparatus & Materials
Chemicals used:
Barium Nitrate, Ba(NO3)2
Sulphuric Acid, H2SO4
Lab equipment used:
Glass beakers (2)
Funnel (1)
Filter paper (5)
Conical flask (1)
5. Method
1. Collect 50 cm3 of Sulphuric Acid and 50 cm3 of Barium Nitrate in
separate beakers.
2. Add the Barium Nitrate to the Sulphuric Acid [Time taken for
steps 1 and 2: 1 minute]
3. Stir the resultant mixture to ensure that the chemicals are
completely reacted. The salt produced is insoluble and will remain
at the bottom of the beaker. [Time taken: 2 minutes]
4. Leave the mixture for several minutes to allow the products to
sink to the bottom of the beaker. [Time taken: 2-3 minutes]
5. Pour away as much of the top layer of water as possible to speed
up the filtration. [Time taken; 1 minute]
6. Filter the BaSO4 into the conical flask using the filter paper
and funnel. Ensure there is a gap between the conical flask and
the funnel at all times, to allow for the free movement of air.
[Time taken: 30 minutes]
7. Press-dry the BaSO4 crystals in-between several layers of filter
paper. [Time taken: 1 day]
8. When the BaSO4 crystals are dry enough, use a plastic spatula to
scrape off the salt into a small plastic bag and seal tightly.
6. Results
After adding the H2SO4 to the Ba(NO3)2, an opaque white mixture was
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