Separation Techniques

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Separation Techniques
Aim: To separate a mixture of Iron filings, CaCO3, NaCl into their pure substances. Apparatus:
2x 150ml beakers 1x 150Ml Beaker •MagnetMatches
Evaporating basinBunsen Burner
Retort standFunnel Paper
SieveIron Filings
tripodGauze Mat
Cling WrapSaftey Goggles
1.Gather Apparatus and the mixture of Iron, CaCO3 and NaCl. 2.Weigh beaker and mixture.
3.Use magnetic separation to remove Iron filings.
4.Set up retort stand and add filter paper to the filter funnel. 5.Put the rest of the mixture into the filter funnel and add water slowly to filter out the water and dissolved NaCl. 6.Evaporate the filtrate to dryness.

7.Put the CaCo3 into a dish and put on a hotplate to dry to a pure substance. 8.Once all substances are in their pure form measure.

Results: Weights
ApparatusWeights (g)
150 Ml Beaker77.8
Beginning Mixture12.24
50ml Beaker35.18
Iron Filings4.83
Filter Paper2.04
Evaporating Basin49.43

Gravimetric Analysis
Beginning Mixture = 12.24g
CaCO3 = 5.09/12.24 x 100
= 41.6%
Iron Filings = 4.83/12.24 x 100
= 39.5%
NaCl =3.33/12.24 x 100
= 27.2%
The procedure we undertook was not very accurate as we ended up with more than 12.24g of mixture. We ended up with 13.25g. The method showed errors as we may not have measured correctly or undertook the right method to separate the substances. These affected the results as the results are then inaccurate. To improve accuracy and reduce errors we could improve the method by making sure to measure properly to get accurate results. We could also repeat the experiment to see where the errors occurred.

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