This lab was basically about finding the percentage of acetylsalicylic acid in an aspirin tablet. First, the base was created, which was made out of 1.00 g of NaOH and D-water. Then the buret was attached to the clamp on the ring stand and the base was poured into the buret. After that, one by one, an aspirin tablet was dropped into an Erlenmeyer flask filled with 50 mL of D-water so that it could become dissolved. After the tablet was completely dissolved, a few drops of phenol were added, and the base was added very slowly, changing the color …show more content…
When the base was mixed with the dissolved aspirin tablets nothing happened. 11. When the drops of phenol were added, then the mixture turned pink. 12. At first, the base was added to quickly so it turned into a dark pink, almost purple. 13. After swiveling the mixture a few times it would lose its pink coloring and turn back into a clear color. 14. At the second try, the base turned into a medium pink color. 15. It stood pink for a longer period of time, approximately 1 minute. 16. The mixtures for all three trials were odorless. 17. At the last try, the base was a light pink color, and it stayed for two minutes. 18. When too much base was added to the phenol/ dissolved aspirin, the mixture would turn into a dark pink. 19. When the base was added in slowly, the pink color lasted a longer time. 20. The faster the base was added, the darker the mixture got, and the longer it took to return to its original clear color.
Raw Data Table: | Initial Reading | Final | Mass of Tablet | Extra | Trial 1 | | | | | Trial 2 | | | | | Trial 3 | | | | | Mass of NaOH | | | | |
Conversion/Calculations: 1. Trial 1: 9.9mL, trial 2: 7.8mL, trial 3: