l-Mass of pure acetylsalicylic acid used to prepare the 250 mL pure aspirin stoc
ID: 1066452 • Letter: L
Question
l-Mass of pure acetylsalicylic acid used to prepare the 250 mL pure aspirin stock standard solution and the concentration (mg/mL) of this solution. Mass of pure acetylsalicylic acid 0.2005 g 0.8020 mg ml. concentration (mg/ml.) Mass of unknown aspirin tablet 0,498lg (200.5 mg/250 ml) /1000 L 0.0008 mg/Lx 1000 mL 0.8020 mg/mL 2- Concentration (m and absorbance for each of the four standard acetylsalicylic acid solutions prepared Volumes (mL) absorbanceConcentration (mg mL 0.497 008 7,5 mln 0,39 50ml. 0255 004 0.02 CIV, CV 0.8020mg/ml x 10 ml C, (100 ml) C, 0.08 mg/ml 3- Volume and absorbance for each of the three unknown" aspirin tablet solutions prepared Volume absorbance 0mL 0.555 600 ml, 0,346 40 ml, 0,205 4- Beer's Law plot and equation for the line (calculated using Excel) 6.005x 0.017 5- Concentration of each "unknown" aspirin tablet solution determined using the Beer's Law plot. absorbance Beerslaw(mg ml)Beers low ppm 0555 0205 00313 y 6.005x 0.017 C A-BIM 0.555 -0.017 6.005 0.0896 mg/ml 6- Calculated mass of acetylsalicylic acid in the tablet for each "unknown" aspirin tablet solution prepared.Explanation / Answer
Determination of amount of acetylsalicylic acid in aspirin tablet
From 5.
we have concentration of acetylsalicylic acid in each unknown solution in mg/ml
1. 0.0896 mg/ml
2. 0.0548 mg/ml
3. 0.0313 mg/ml
So,
6. If the unknown solution was 10 ml with 1 tablet
mass of acetylsalicylic acid in the tablet for,
1. 0.0896 x 10 = 0.896 mg
2. 0.0548 x 10 = 0.548 mg
3. 0.0313 x 10 = 0.313 mg
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