A student wishes to synthesize butyl acetate in the laboratory, one of the molec
ID: 1029784 • Letter: A
Question
A student wishes to synthesize butyl acetate in the laboratory, one of the molecules primarily responsible for the odor of apple, through a Fisher Esterification procedure. She collected the following data before starting her pre-lab preparation, but needs to calculate the missing data in order to perform the synthesis.
a. Write out the full reaction equation for the synthesis of butyl acetate and water from acetic acid plus 1-butanol, using a concentrated sulfuric acid catalyst. Use the reaction scheme given in the introduction as your guide. Balance the equation and be sure to indicate the stoichiometry of each chemical in your equation.
Boiling Point MW (g/mol) Density (g/mL) moles (C grams mL 10.0 (target) 116.2 74.1 60.1 0.88 0.81 1.05 126 butyl acetate 1-butanol lacial acetic acid 118Explanation / Answer
The required balanced reaction is as follows:
1-butanol + glacial acetic acid---->butyl acetate (catalyst H2SO4)
CH3CH2CH2CH2OH +CH3COOH ---->CH3COOCH2CH2CH2CH3
Stoichiometric ratio of 1-butanol: 1-butanol : butyl acetate=1 :1 :1
moles of Butyl acetate =mass/MW=10.0g/116.2g/mol=0.086 mol
mol of 1-butanol=0.086 mol
mol of glacial acetic acid=0.086 mol
ml of Butyl acetate=mass/density=10.0g/0.88g/ml=0.88ml
mas of glacial acetic acid=mol*M=0.086mol*(60.1g/mol)=5.172g
ml of glacial acetic acid=mass/density=5.172g/1.05g/ml=4.926ml
mass of 1-butanol=0.086mol*74.1g/mol=6.373 g
ml of 1-butanol=6.373g/0.81g/ml=7.867ml
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