Please complete 10, 11 ,12 and answer the question! 1) Commercial Aspirin tablet
ID: 536824 • Letter: P
Question
Please complete 10, 11 ,12 and answer the question!
1) Commercial Aspirin tablets used in this lab contained 325mg of active ingredient. Calculate the percent difference of your result vs this true value. % difference = (Measured - True)/True * 100%
11 Calculated Conc. 12 Part II and III: The Standards 13 3.552x10 -4 14 Bl Standard Solution 2 15 D4l Standard Solution 3 0.558 16 standard solution 4 0.072 17 [6] Standard Solution 5 18 (71 Construct a Calibration graph of Concentration VS Absorbance with a trendline equation. 19 1.6 20 1.4 21 1.2 22 23 0.8 24 0.6 y 0.1671x 25 0.4 Ri --1.6778 26 0.2 27 28 29 Part IV: Analysis of a Tablet 30 [9] Absorbance of Diluted Commercial Tablet 31 [10] Calc. Conc. (M) of Diluted Commercial Tablet (100mL) 32 [11] Calc. Conc. (M) of initial Commercial Tablet (250mL) 33 [12] Moles of Aspirin in Tablet (mol) 325 mg 34 [13] Mass of Aspirin in Tablet in milligrams (mg) Plot AreaExplanation / Answer
You have prepared a set of 5 standard solutions and you plot the absorbance vs concentration data for the solutions. The values are given in the table. Construct the linear regression curve.
Plot of absorbance vs concentration of standard solutions
[10] Use the linear regression equation to compute the absorbance of the diluted sample. Put absorbance, y = 0.641 and find out x.
0.641 = 3857*x – 0.1863
===> 3857*x = 0.641 + 0.1863 = 0.8273
===> x = 0.8273/3857 = 2.14493*10-4 2.145*10-4
The concentration of the diluted aspirin sample is 2.145*10-4 M (ans).
[11] The value in [10] represents the concentration of aspirin in the diluted sample. I am guessing you prepared a 250 mL solution of aspirin and then took a certain volume of that prepared solution and diluted further to 100 mL. I need that volume to answer the following questions.
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