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practice final sp10 not key

practice final sp10 not key - Chem 143A Practice 1 Table of...

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Chem. 143A Practice 1. Table of Reagents Compound MW (g/mol) mmoles Density (g/ml) Amount Physical Constants Hazards 3- Benzenedicarboxylic acid 166.13 20 3.32 g mp 341-343 ºC irritant Methyl alcohol 32.04 0.791 10 ml mp -98 ºC bp 64.7 ºC Highly Flammable Con. H 2 SO 4 0.5 ml Corrosive Acid, Alcohol and catalytic amount of concentrated sulfuric acid were placed in a flask equipped with reflux condenser and drying tube. The reaction mixture was heated to reflux in sand bath that was preheated to 90 o C. After 90 minutes the reaction mixture was cooled to room temperature and the condenser was removed. 20 ml of saturated NaHCO 3 solution was added and then the reaction mixture was heated for additional 20 minutes at 80 o C. The residue was diluted with 20 ml CH 2 Cl 2 and the aqueous layer was separated. The organic layer was dried over Na 2 SO 4 and the solvent was evaporated to give pure ester. a. Complete the chemical equation. COOH COOH + CH 3 OH H 2 SO 4 b. Calculate how many moles of methyl alcohol were used.
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practice final sp10 not key - Chem 143A Practice 1 Table of...

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