help lab 7 - EXP. NUMBER EXPERIMENT/SUBJECT DATE 1 NAME...

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The limiting reagent is salicylic acid. The theoretical yield of acetyl salicylic acid is 2.52 g. 1 EXP. NUMBER EXPERIMENT/SUBJECT DATE LOCKER NO. COURSE & SECTION NO. NAME Organic Chem 2 Lab The Preparation of Aspirin 1 2/29/00 chem 3341-111 55 John Doe (TA: Gregg N. Yard) The purpose of this experiment is to synthesize aspirin (acetyl salicylic acid) from salicylic acid and acetic anhydride. Physical Data:* salicylic acid acetyl salicylic acid acetic anhydride acetic acid sulfuric acid ethyl acetate MW 138 180 102 60 98 88 mp 157-9˚ 135-6˚ bp 138˚ 117-8˚ 77˚ density 1.08 1.049 1.84 0.90 solubility al, eth, ace al, eth, chl hazards toxic irritant corrosive, lachrymator corrosive corrosive flammable Calculations: CO 2 H OH H 3 COC H 3 OO H 2 SO 4 CO 2 H OC H 3 O H 3 CO H O + salicylic acid 2 g 0.014 mole acetic anhydride 5 mL 0.05 mole ethyl acetate + acetyl salicylic acid acetic acid 2 g salicylic acid (1 mole/138 g) = 0.014 moles
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