Unit 2- Practical Scientific Procedures and Techniques
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BTEC Level 3 Applied Science unit 2D
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Unit 2- Practical Scientific Procedures and Techniques
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PEARSON (PEARSON)
Hello, this is a D* (Distinction) grade on unit 2D . All criteria to achieve P7, M4 & D4 have been accomplished in this assignment. Everything included in this assignment is based upon me and my skills in the lab. By reading this assignment you will understand what the assessor and examiner want to...
Unit 2- Practical Scientific Procedures and Techniques
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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.
Learner signature: Abdul Binah
Date: 1/02/23
Unit 2: Practical scientific procedures and techniques
Learning aim D: Review personal development of scientific skills for laboratory work
I am a newly appointed technical assistant at a large chemical plant, Chemcalequip. In order to complete
my induction period and progress within the company I have to review and evaluate my performance of
the procedures and techniques that I have been involved in using so far (titration, colorimetry, calorimetry
and chromatography.) I need to identify the key practical and personal competencies I have shown whilst
developing and using these skills.
During my laboratory work in unit 2, I have taken part in:
Risk assessments:
- To identified all possible hazards in a lab.
- Level of risks for each hazard.
- Course of action to prevent hazard.
- What to do if hazards occur.
• Chromatography:
- To carry out the experiment correctly and safely.
- Worked with different stationary phases such as chlorophyll and 3 types of amino acids and
worked with new chemicals like ninhydrin and acetone.
- Obtained accurate results by calculating Rf value.
- Experienced different ways to carry out chromatography such as TLC chromatography and paper
chromatography.
• Titration:
- Learnt how to standardise solution of HCL & Na2CO3.
- Correct use of a pH meter and correctly calibrated it.
- Obtained accurate results.
- Correct use of a pipette filler.
- New skill: reading from the meniscus & calculating percentage error.
, • Calorimetry
- To obtain accurate results from gradient calculations.
- Calibration between two different thermometers (glass liquid and digital).
• Colorimetry
- To carry out a successful method to identify absorbance using The Beer-Lambert Law.
- Correctly calibrating colourimeter machine.
- To obtain accurate results using The Beer-Lambert Law.
- To find an unknown substance absorbance.
• Previous skills I had in lab work were:
- Calculation of Rf values.
- Identifying certain hazards, the level of risks and actions to prevent them.
- Calculating gradients and tangents from graphs.
• New skills I have learnt in the lab:
- Choosing correct methods to represent graphs such as, bar graphs, histograms, comparative and
composite graphs etc.
- Making different concentrations of solution.
- Learnt how to calibrate equipment e.g., calorimeter and colourimeter etc.
- Finding an unknown concentration.
- How to carry an investigation using hypothesis.
- Calculating the percentage error.
- I have improved my interpersonal skills by interacting with my new peers and forming a
relationship in the time we have had together.
· In learning aim A (Undertake titration and colorimetry to determine the concentration of solutions):
· I have developed skills & techniques such as:
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