Unit 2- Practical Scientific Procedures and Techniques
Institution
PEARSON (PEARSON)
This is an example for the unit 2D: Reviewing Progress for applied science and should be only used as a guide and is not to be copied.
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Unit 2- Practical Scientific Procedures and Techniques
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Unit 2D: Review on personal
development of scientific skills
for laboratory work
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.
, Skill Developed Skill relation to Level of skills before studying Unit 2. Level of skills now after studying Unit 2
practical
Calibration of a balance Titration/ I was unaware of the need or requirement for the calibration of a I can now successfully calibrate a balance in order to fi
Colorimetry balance before. object.
Tap control with burette Titration I struggled to combine the mixing and adding of the acid at GCSE, Through practicing the technique after many titrations
causing too much acid to be added. successfully titrate to a high level of accuracy.
Rinsing burette Titration Before I had not known the requirements necessary to ensure the Now I can use an acid to ensure the burette is thoroug
burette is clean and free of any liquids. any previous chemicals.
Usage of a pipette filler Titration/ I had not used a pipette filler before carrying out titrations and I can now confidently use a pipette filler adjoined with
Colorimetry was new to the equipment. successfully measure a specific volume of liquid.
Reading from the meniscus Titration/ I was unsure of where to read the meniscus from and would tend I now know to measure from the bottom of the menis
Colorimetry to use guess work to read from the middle of the meniscus. method of glassware.
Thermometer calibration Calorimetry I was not aware of the requirement to perform calibration of a I am now aware of the need to ensure that thermome
thermometer. ensure the optimum accuracy by using a substance wi
temperature.
Use of online graphing software Calorimetry I had only used software such as excel which used a less accurate I am now able to use DESMOS to complete graphs to a
scale and was not as easy to use. reflect the real-life application.
Knowing about the change in melting Calorimetry Before studying this course I was unaware of how the pressure in I now know why and can calculate the change in melti
point due to atmospheric pressure the atmosphere can change the melting point of a substance. change in atmospheric pressure using online software
Thermometer reading Calorimetry I was aware of how to read a digital thermometer and had some Now I know that you should be at eye level to be able
basic knowledge reading a alcohol filled thermometer. the value from the thermometer and know different im
Lines of best fit and rates of reaction Calorimetry I was able to draw a rough line of best fit at GCSE along with I can now draw lines of best fit to better match the po
simple rates of reaction calculations. rates of reaction are drawn with greater precision thro
Plotting pigment Chromatography At GCSE in the food dye separation, I had only completed the Now I am able to transfer solid substances to be analy
liquid compound to be identified. on the base line.
Using a fume cupboard Chromatography I had not used a fume cupboard prior to starting Unit 2 Now I know why to use a fume cupboard and the proc
Using a colorimeter Colorimetry I had never used a colorimeter before doing Applied Science I can now use the settings on a colorimeter to measure
that is absorbed by a solution or that passes through.
Calculating Rf values Chromatography I had done some Rf calculations before at GCSE, but had not used I can now compare my results with results obtained fr
them to determine the name of a compound. order to find the compound and what a substance is m
Quantitative chemistry calculations Titration/ I had done some calculations before at level 2, but struggled to I am now able to remember the majority of equations
Colorimetry remember the required equations and often needed to reference. concentration which is less time consuming and more
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