NEW L3 Unit 2 Applied Science: sample results

Sample results for practical-based assignments A, B and C for Unit 2 Practical Scientific Procedures and Techniques.

Includes results for calibration of 3 pieces of equipment, 2x titrations (one using indicator, one using a pH probe) and colorimetry for assignment A.

For assignment B includes results for calibration of a glass and digital thermometer in hot and cold water and cooling of both stearic acid and paraffin wax.

supporting videos for assignments:
A
plotting and annotating pH curve: https://youtu.be/mgNhkUipZw0
Plotting and annotating colorimetry curve:
https://youtu.be/IXXOmPygKXY
Writing chemical foon a computer:
B
plotting cooling curves: https://youtu.be/92zysOBqKP8
Finding and referencing a literature value:
https://youtu.be/b4jkipDtO9k
Drawing a tangent to a curve:
https://youtu.be/Ne-cxsjHPIM

Includes amino acid and plant chromatography for assignment C.
Note amino acid was paper chromatography and basil was used for the plant chromatography, which was thin layer chromatography.

Solvents used for chromatography were as follows: For the amino acid chromatography we used a mixture of solvents in the following ratio: butanol, water and ethanoic acid in 4:2:1, respectively.
For the plant chromatography we used a mixture of solvents again, in the following ratio: cyclohexane, acetone and petroleum ether in 5:3:2.