BTEC Level 3 Subsidiary Diploma in Applied Science
Unit 4 Scientific Practical Techniques
Analytical Techniques
Assignment brief – QCF BTEC
Assignment front sheet: 4.1 Analytical Techniques
Learner name
Date issued
Target
Assessor name
D*
Mrs N Turner-Smith
Completion date
Submitted on
Unit number and title
Unit 4: Scientific Practical Techniques
Assignment title
Analytical Techniques
In this assessment you will have opportunities to provide evidence against the following criteria.
Criteria
reference
To achieve the criteria the evidence must show that the
learner is able to:
Task
No.
Evidence
Carry out quantitative and qualitative analytical
techniques
P1
Preparing standard solutions using weighing methods and stock
solution methods.
1
Titration
2
Explain how accuracy may be ensured in the techniques
used
M1
Student record sheet of task 1 and 2
3
Student record sheet of task 4
5
Evaluate the quantitative and qualitative analytical
techniques used, suggesting improvements for future
investigations
D1
Student record sheet of task 1 and 2
3
Student record sheet of task 4
5
Learner declaration
I certify that the work submitted for this assignment is my own and research sources are fully acknowledged.
Learner signature:
Date:
1
BTEC Level 3 Subsidiary Diploma in Applied Science
Unit 4 Scientific Practical Techniques
Analytical Techniques
Assignment 4.1 brief
Qualification
BTEC Level 3 Subsidiary Diploma in Applied Science
Unit number and title
Unit 4: Scientific Practical Techniques
Start date
Deadline
Assessor name
Assignment title
Mrs N Turner-Smith
Analytical Techniques
The purpose of this assignment is to demonstrate an understanding of the use of analytical techniques, specifically
both quantitative and qualitative techniques
Scenario
You are a newly appointed technical assistant in a chemical plant, you must demonstrate that you have retained
good laboratory skills in the preparation and use of equipment. A number of substances in the laboratory you work
in have been mislabelled. You must conduct a number of tests to identify some unknown substances and the
concentrations of some known substances. (You should identify hazards and necessary control measures to reduce
any risks.)
Task 1
P1 Carry out quantitative and qualitative analytical techniques
Prepare a standard solution of NaOH. These should be of the strength 1m. Your standard solutions will then be
used to determine the concentration of an unknown sample of HCl.
Prepare two standard solutions of HCl from a stock solution of 2M HCl. These should be of the strength 1m and
0.5m and a volume of 200ml.
You must include safety considerations and a risk assessment. Your notes must be clear showing necessary
calculations at all stages. You should use the standard methods of specified concentration by weighing and making
standards from a known concentration solution.
.
Due date:
Task 2
This provides evidence for P1 (part)
P1 Carry out quantitative and qualitative analytical techniques
Use titration to test the accuracy of the two solutions you have made. You need to include calculations and
balanced chemical equations and show your working. You must include safety considerations and a risk
assessment. Your notes must be clear showing necessary calculations at all stages.
Due date:
Task 3
This provides evidence for P1(part)
M1: Explain how accuracy may be ensured
in the techniques used
D1: Evaluate the quantitative and qualitative
analytical techniques used, suggesting
improvements for future investigations
Using the student record sheet explain how you ensured accuracy in your techniques. You need to include in your
discussion the equipment that you used. (M1)
Explain any improvements which you could make to your practical’s. You need to fully evaluate the procedures that
were carried out and use appropriate references to compare techniques. (D1)
.
Due date:
This provides evidence for M1 and D1 (part)
2
BTEC Level 3 Subsidiary Diploma in Applied Science
Task 4
Unit 4 Scientific Practical Techniques
Analytical Techniques
P1 Carry out quantitative and qualitative analytical techniques
Your local supermarket has recently had several bottles of Taunton’s Peculiar Real Ale returned,
customers complaining that the beer has a “strange metallic taste”, making it unpleasant to drink. You
will use a number of relatively simple chemical tests and infrared spectroscopy to identify possible
contaminants. You will be provided with known materials which will show a positive result, which you
can then compare with the results from testing the beer sample. Use the worksheet provided to record
your results.
Date Due:
Task 5
This provides evidence for P1 (part)
M1: Explain how accuracy may be ensured
in the techniques used
D1: Evaluate the quantitative and
qualitative analytical techniques used,
suggesting improvements for future
investigations
Using the student record sheet explain how you ensured accuracy in your techniques. You need to include in your
discussion the equipment that you used. (M1)
Explain any improvements which you could make to your practical’s. You need to fully evaluate the procedures that
were carried out and use appropriate references to compare techniques. (D1)
Due date:
This provides evidence for M1 and D1 (part)
Evidence checklist
[Summarise evidence required, e.g. ‘leaflet’, ‘presentation notes’ etc.]
[tick
boxes]
Standard solutions of sodium hydroxide and hydrochloric acid
Titration to assess accuracy
Discussion sheet on practical
Testing for anions and cations
Discussion sheet on practical.
Sources of information
Annets F, Foale S, Hartley J, Hocking S, Hudson L, Kelly T, Llewellyn R, Musa I and Sorensen J – BTEC Level 3
National Applied Science Student Book (Pearson, 2010) ISBN 9781846906800
Coyne G S – The Laboratory Companion: A Practical Guide to Materials, Equipment and Technique
(John Wiley & Sons, 2005) ISBN 9780471780861
Dean J R et al – Practical Skills in Chemistry (Prentice Hall, 2001) ISBN 9780130280022
Lawn R and Prichard E – Practical Laboratory Skills Training Guide: Measurement of Mass (The Royal Society of
Chemistry, 2003) ISBN 9780854044634
Prichard E and Lawn R – Practical Laboratory Skills Training Guide: Measurement of Volume (The Royal Society of
Chemistry, 2003) ISBN 9780854044689
A virtual laboratory
3
BTEC Level 3 Subsidiary Diploma in Applied Science
Unit 4 Scientific Practical Techniques
Analytical Techniques
This brief has been verified as being fit for purpose
Assessor
Mrs N Turner-Smith
Signature
Internal verifier
Signature
Date
06/07/2015
Date
06/07/2015
Ms Fensome
4
BTEC Level 3 Subsidiary Diploma in Applied Science
Unit 4 Scientific Practical Techniques
Analytical Techniques
Assessor's comments
Qualification
BTEC Level 3 Subsidiary Diploma in
Applied Science
Assessor
name
Unit number and
title
Unit 4; Scientific Practical
Techniques.
4.1 Analytical Techniques
Learner
name
Criteria
reference
Mrs N Turner-Smith
To achieve the criteria the evidence must show that the learner is
able to:
Achieved?
Demonstrate the use of quantitative and qualitative techniques.
P1
M1
D1
Ensure accuracy in both quantitative and qualitative analysis. Aspects
of good volumetric technique should be discussed and the need to
avoid contamination in the spot tests explained.
Be critical of the way they carried out the practical’s. They should
explain the consequence of particular errors in technique, e.g. not
mixing solutions, overshooting the endpoint, not cleaning the wire
properly in flame tests. They may also justify improvements to the
methods given to carry out the practical.
Learner feedback
Assessor feedback
Assessor signature
Date
Learner signature
Date
5