Summary UNIT 4 D2

BTEC Level 3 Extended Diploma in Applied Science
Assignment Front Sheet/Feedback Sheet
Unit 4: Scientific Practical Techniques

Assignment Title: 4.2 Separation Techniques & Assessment of Purity
Registration
Learner’s Name: number:
Start Date: Deadline:

Grading Criteria: Met
P2 Demonstrate use of scientific techniques to separate substances.

P3 Estimate the purity of samples using scientific techniques.

M2 Describe the factors that influence purity

D2 Evaluate the accuracy of the methods used to estimate the purity of the samples.


Assessor’s Feedback (see also sheet on reverse)

Attempted: P2 P3 M2 D3

Preparation of Aspirin for P2 – Observed by assessor: Yes/No
Carried out solvent extraction for P2 – Observed by assessor: Yes/No
Carried out distillation for P2 – Observed by assessor: Yes/No
Carried out precipitation for P2 – Observed by assessor: Yes/No
Carried out centrifugation for P2 – Observed by assessor: Yes/No
Carried out electrophoresis for P2 – Observed by assessor: Yes/No
Melting Point procedure for P3 – Observed by assessor: Yes/No
Titration procedure for P3 – Observed by assessor: Yes/No




Assessor’s Name Assessor’s Signature Date


IV Comments (if student needs to correct or add to work)



Learner’s Declaration:
I certify that the work submitted is my own.
Learner’s Signature Date


Feedback Sheet
GC Action Done
P2 You have given a brief description and a suitable diagram of the following
techniques: filtration, drying, crystallisation and chromatography techniques
(carried out in the preparation of aspirin).
P2 You have given a brief description and a suitable diagram of the technique solvent