DATA SHEET
Date Name
Aspirin Partner
Sample Mass of Tablet or
Powder (g)
Final Buret
Reading (mL)
Initial Buret
Reading (mL)
Volume of NaOH
Used (mL)
Acetylsalicylic Acid
(Aspirin)
0.5g 3.7ml 0.00mL 3.7mL
Tablet 1 =
________________
4.9g 6.1mL 3.7mL 2.4mL
Tablet 2 =
________________
5.2g 10.3mL 6.1mL 4.2mL
Tablet 3 =
________________
4.9g 14.3mL 10.3mL 4mL
Sample (ml/g) See Sample Calculation % Acetylsalicylic Acid (Aspirin)
Acetylsalicylic Acid
(Aspirin)
7.4 100%
Tablet 1 =
________________
0.49 6.62%
Tablet 2 =
________________
.81 10.9%
Tablet 3 =
________________
.82 11.1%
Sample I2 Test FeCl3 Test NaHCO3 Test
Acetylsalicylic Acid
(Aspirin)
NEGATIVE
ORANGE
N/A N/A
Salicylic Acid N/A POSTIVE DARK
PURPLE
N/A
Starch POSTIVE SOLID
BROWN
N/A N/A
Tablet 1 =
________________
POSITVE BROWN POSITIVE LIGHT
PURPLE
N/A
Tablet 2 =
________________
POSITIVE BROWN POSITVE PURPLE N/A
Tablet 3 =
________________
POSITIVE DARK
BROWN
POSITIVE LIGHT
PURPLE
N/A
Answer these Questions: Explain your reasoning briefly in each case:
A. Was starch used as a binder in your aspirin tablets? How do you know?
Yes, it was because in the starch test it tested positive with a solid brown.
B. Which tablet had the highest percentage of pure aspirin by the titration method?
Tablet number 3 has the highest percentage at 11.1% of pure aspirin
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