Spectrophotometry of Aspirin - A Research Questions The purpose of this experiment is to answer the following questions 1 What percentage of consumer

# Spectrophotometry of Aspirin - A Research Questions The...

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A.Research QuestionsThe purpose of this experiment is to answer the following questions:1.What percentage of consumer grade aspirin tablets, specifically Krogerand Bayer, is pure aspirin?2.Which brand would be a better purchase? B. Observations and Results Tables Data for Consumer Grade Aspirin Tablets Brand Advertised Mass of Aspirin per Tablet (g) Mass of Aspirin per tablet (g) % Aspirin per Tablet Kroger 0.325 0.373 0.580 0.320 85.3% Bayer 0.325 0.402 0.582 0.321 79.9% Graphs 0 0 0 0 0 0.01 0.01 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 f(x) = 181.14x R² = 0.94 Absorbance VS Concentration Aspirin Aspirin (g/mL) Absorbance Pure Aspirin Concentrates VS Absorbance Aspirin ( g mL ¿ Absorbance 0 0 0.0005 0.318 0.001 0.336 0.002 0.48 0.003 0.58 0.004 0.747 0.005 0.765
Calculations From above graph: y = 181.14x Therefore: A = 181.14c Mass of Aspirin: Kroger: 181.14 c = 0.580 c = 3.20 × 10 3 g mL ( 3.2 × 10 3 g mL ) × 100 mL = 0.320 g Bayer: 181.14 c = 0.582 c = 3.21 × 10 3 g mL ( 3.21 × 10 3 g mL ) × 100 mL = 0.321 g Percentage Aspirin in Tablet Kroger | 0.320 g 0.375 g | × 100 = 85.3