Unit 2- Practical Scientific Procedures and Techniques
Essay
BTEC Level 3 Applied Science unit 2B assignment
119 views 2 purchases
Course
Unit 2- Practical Scientific Procedures and Techniques
Institution
PEARSON (PEARSON)
Hello, this is a D* (Distinction) grade on unit 2B assignment covering a hypothesis, aim, risk assessment, equipment, method, calibration, results, graphs of results, calculations + gradient, conclusion, analysis and evaluation all on undertaking calorimetry to study cooling curves. All criteria to...
Unit 2- Practical Scientific Procedures and Techniques
All documents for this subject (361)
Seller
Follow
AbdulBinah
Reviews received
Content preview
Abdul Binah
Unit 2: Practical Scientific Procedures and
Techniques
Keeping up the standards
Cooling curve of steric acid and paraffin wax.
I am a newly appointed technical assistant at a large
chemical plant, Chemcalequip. As part of my induction
period and to progress in my role, I had to
demonstrate skills in a range of practical procedures and
techniques. Part of my role is to ensure equipment is
calibrated and equipment and chemicals are safety checked.
I needed to demonstrate my ability to use a calorimeter
and associated equipment to obtain data to determine,
analyse and evaluate the rate of cooling of certain substances.
Hypothesis-
I predicted that the results of the cooling curve would appear as a line of best fit with a gradient of -2.
The temperature of the steric acid would alter by 1.4 c° every 60 seconds; the temperature of paraffin
wax would alter by 2.4 c° every 60 seconds.
Aim-
The purpose of this practical is to undertake calorimetry to compare the cooling curve of paraffin wax
and steric acid in order to produce reproducible results on a cooling curve graph, analyse the difference
between the graphs and evaluate the method used to commence the experiment and potentially
suggest any improvements to get acceptable results if not previously obtained.
, Risk assessment-
•Wear safety goggles when carrying out this experiment.
•Make sure any beakers are on the centre of tables to avoid glass shattering when falling from elevated
surfaces.
• Be aware of boiling water spillage when transferring from kettle to beakers + boiling tubes and when
handling hot glassware.
• You must tie long hair back, put away lanyards and tuck in ties; you may also consider wearing
protective clothing such as handwear and a lab coat because of danger from boiling water and acidic
substance.
! Attention! Steric acid is being used and is a skin irritant. In any case the acid comes in contact with
your skin, you must wash it off immediately.
Apparatus/equipment-
• Liquid glass thermometer
• Digital thermometer/ ethanol-based thermometer (digital thermometer didn’t fit in test tube)
• Boiling tubes
• Boiling tube stand
• Stopwatch
• Beakers
• Steric acid
• Paraffin wax
• Ice
• Boiling water
• Kettle
• Graph paper
• Pencil
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller AbdulBinah. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.31. You're not tied to anything after your purchase.
