Extended Essays 2021



1g Ferric chloride, solid (0.0062mol)

Appendix #9: dilutions of pure methyl salicylate with ethanol to make up the varying percentage concentrations of methyl salicylate Percentage Concentration of methyl salicylate (%) Volume of Methyl Salicylate ( ± . ) Volume of Ethanol ( ± . ) 10 1 9 20 2 8 30 3 7 40 4 6 50 5 5 Appendix #10: Raw data – Absorbance for the concentrations of methyl salicylate (10-50%): Percentage concentration of methyl salicylate Absorbance ( ± . ) Trial 1 Trial 2 Trial 3 10 1.2081 1.2052 1.2176 20 1.3495 1.3726 1.3685 30 1.5962 1.6441 1.6366 40 2.1192 2.0107 2.1168 50 2.4335 2.4451 2.4341 Appendix #11: Absorbance (An) of each solution of increasing reflux duration (1-5 hours) Duration of reflux ( ) Absorbance ( ± . ) Trial 1 Trial 2 Trial 3 1 1.4660 1.4697 1.4756 2 1.5340 1.5303 1.5320 3 1.6644 1.6582 1.6563 4 1.7519 1.7478 1.7493 5 1.8316 1.8269 1.8295 Appendix #12: Raw data – mass of the methyl salicylate solutions of increasing reflux duration Duration of reflux ( ) Mass ( ± . g) Trial 1 Trial 2 Trial 3 1 11.7475 11.0429 10.8445 2 11.8275 12.2295 11.0336 3 12.0175 11.9395 11.0475 4 12.0031 12.4975 13.1975 5 12.2375 12.0004 12.1475

Appendix #13: Theoretical mass of methyl salicylate Assuming 1:1 ratio and that the liming reactant is salicylic acid (0.2mol)

=

0.2 152.1494 /

= 30.4299

Appendix #14: The percentage error associated with the average absorbance measured for the synthesise solutions

1: % =

× 100

20