Assignment brief – QCF BTEC
Assignment front sheet
Qualification Unit number and title
Pearson BTEC Level 3 90-credit Diploma in Applied Unit 4 : Scientific Practical Techniques
Science
Learner name Assessor name
Nergiz Canitez Dona Mannaperuma
Date issued Hand in deadline Submitted on
01/04/2019 07/05/2019 07/05/2019
Assignment title Separating and estimating purity
In this assessment you will have opportunities to provide evidence against the following criteria.
Indicate the page numbers where the evidence can be found.
Criteria To achieve the criteria the evidence must show Task no. Evidence
reference that the learner is able to:
Demonstrate use of scientific techniques to
P2
separate substances.
1 X
Estimate the purity of the sample using
P3
scientific techniques.
2 X
M2 Describe the factors that influence purity. 3 X
Evaluate the accuracy of the methods used to
D2
estimate the purity of the sample.
4 X
Learner declaration
I certify that the work submitted for this assignment is my own. I have clearly referenced any sources
used in the work. I understand that false declaration is a form of malpractice.
Unit number and title Unit 4 : Separating and estimating purity
Assessor name Dona Mannaperuma
Date issued 01/04/2019
Hand in deadline 30/04/2019
Assignment title Searching and Using of Instruments/ Sensors to Test Materials
Purpose of this assignment:
To assess learners’ knowledge and understanding of AC. P2,P3, M2, D2.
Scenario
You have recently been accepted to a post as a research technician for Global Chemicals
plc. You are researching the manufacture of substances with particular reference to the
isolation, purification, calculation of yield and atom economy.
Task 1
Follow a range of procedures to obtain substances below,
Preparation of CuSO4
Preparation of Aspirin
Extracting pigments from leaves
Identify the separation techniques used during these procedures.
This provides evidence for [P2]
Task 2
Estimate the purity of the Aspirin sample you made by using melting point,
chromatography and spectrophotometer techniques. Report your results in a suitable
format.
This provides evidence for [P3]
Task 3
Describe the factors influencing purity of your final Aspirin sample, eg; during
crystallisation, filtration and drying.
This provides evidence for [M2]
Task 4
2
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