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P1, P2, M1, M2, P5, M5, D1, D2, D3 - Unit 22 - BTEC Applied Science Extended Diploma £7.49
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  2.  
  3. PEARSON (PEARSON)
  4.  
  5. Applied Science 2010 QCF
  6.  
  7. Unit 22 - Chemical Laboratory Techniques

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P1, P2, M1, M2, P5, M5, D1, D2, D3 - Unit 22 - BTEC Applied Science Extended Diploma

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  • May 13, 2018
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  • 2016/2017
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Unit 22 P1, P2, M1, M2, D1, D2, P5, M5, D3– Applied Science


P1 – Follow a range of procedures to obtain substances by reacton and extractonn
M1- Describe the scientic principles behind the key steps in the preparatie methods for
substancesn
D1 – Explain how the yield, purity and atom economy of the substances prepared may be
affected by changes to the methods usedn
P2 – Follow methods to determine % yields, % purity and atom economy of prepared
substancesn
M2 – Describe the main problems with each of the preparatie methods usedn
P5 – Perform quanttatie analysis of commercial/natural substances by following giien
methodsn
M5 – Identfy sources of errors and uncertainty in the quanttatie analyses carried outn
D3 – Eialuate the reliability of the analyses of the commercial/natural compoundsn

Preparaton 1 - Separaton techniquesn Rock and Salt

Aim: To separate the salt from the rock and salt mixture which would then be used in order to
calculate its percentage yield.

Equipment:

- Rock and salt mixture

- Tripod

- Conical fask

-Stirring rod

- Balance

-Metal gauze

- Tongs

- Beaker

- Heating basin

- Bunsen burner

- Spatula

- Filter paper

Method:

1. Use the accurate balance to record the weight of the heating basin. Using a spatula fll a small
amount of the rock and salt mixture into the basin.

2. Place the mixture from the heating basin into a beaker and fll it with distilled water till the 100ml
line. Use the stirring rod to dissolve all of the salt in the mixture.

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