Unit 2- Practical Scientific Procedures and Techniques
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Unit 2 Practical scientific procedures and techniques assignment B
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Course
Unit 2- Practical Scientific Procedures and Techniques
Institution
PEARSON (PEARSON)
This is my unit 2 assignments B. I have received a distinction for this assignment, meaning I got distinction for the whole unit. This unit is well presented, written, and detailed.
Assignment B has 17 pages and 2349 words.
Title
Cooling curve for stearic acid
Introduction
Cooling curves show how the temperature of a substance changes after heating. I
will carry out an experiment to record cooling data for a sample of hot water using
stearic acid which is allowed to cool at room temperature for 20 minutes.
Investigating the cooling rate and freezing point of stearic acid
CH3 (CH2)16CO2H
Stearic acid background
Stearic acid is a type of fatty acid that is found it is a wax-like material that might be
white or colourless and has an unpleasant odour. It can be dissolved in oil, but
because it is waxy, it is difficult to dissolve in water. Because it is only partially
soluble in water, it will float on top of the water if mixed with it.
Stearic acid has an 18-carbon chain and is also known as Octadecanoic acid; it is
classified as a long-chain fatty acid in chemistry. Stear is a Greek word that refers to
the fats that are created as a by-product of the processing of meats.
Stearic acid is used to make emulsifiers, lubricants, ointments, lotions, and
emollients, among other things. Stearic acid effectively stabilises, thickens, and
softens the moisturiser or ointment, assisting in the creation of a cooling sensation
when applied to the skin.
Lubricants with stearic acid have a smooth, pearl-like finish. Soaps, Shaving Creams
and Detergents, Lotions, Moisturizers, and Face Creams, candles, rubber, Paints &
Coatings, plastic, butteries, and fireworks are all possible applications.
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