This is an organic chem lab question sheet. I was wondering if anyone could help

Question

This is an organic chem lab question sheet. I was wondering if anyone could help me with the following questions? I used 16.5mL of 3-methyl-1-butanol compound and 2.5 mL of acetic acid. I was given the boiling points for all of the compounds and the g/mL. I just don't know how to fill out this sheet. Thanks for any help!!

Limiting Reagent: ___isoamyl acetate_______          Mass of Limiting Reagent: _________                                                      

Theoretical Yield: _________                              

Mass of Isoamyl Acetate (Actual Yield): _________            Percent Yield: _________               

QUESTIONS: Attach solutions to the following questions to this sheet.

1. Explain why the equation defining the equilibrium constant for Fischer esterification (in lab manual – experiment 2) does not contain a term for sulfuric acid.

2. For each of the following esters, give the structure of the alcohol and carboxylic acid that would be used to prepare that ester by Fischer esterification.

Explanation / Answer

In your experiment , 3-methyl-1-butanol is the alcohol used and acetic acid is the carboxylic acid used for esterification.They give isoamyl acetate as the ester product.

the reaction so that occurs is

3-methyl-1-butanol+acetic acid=isoamyl acetate(with sulfuric acid as catalyst)

knowing the limiting reagent

you will need to put the values in g/ml of the reactants for calculations in this part

But as you haven't given those values here .I will assume g/ml of alcohol to be x g/ml and acid to be y g/ml

First calculate the number of moles of both the reactants -

mass of alcohol=volume taken* g/ml=16.5 ml *x g.ml= 16.5 *x g

number of moles of alcohol=mass of alcohol/molar mass of alcohol=16.5 *x g/88.148 g/mol=16.5 *x /88.148 (find this value)

similarly calculate the number of moles for the acid ,

ass of alcohol=volume taken* g/ml=16.5 ml *x g.ml= 16.5 *x g

number of moles of acid=mass of acid/molar mass of acid=16.5 *x g/60.05 g/mol=16.5 *x /60.05 (find this value)

The reactant with lesser number of moles is the limiting reagent.(compare the values of moles)

calculating theoretical yield

3-methyl-1-butanol+acetic acid=isoamyl acetate

From this reaction we see that alcohol reacts with equal moles of acid to give same mole of product .But one of the reactant is lesser in amount(moles) ,so it will react with the same amount of the other reactant only.

And equal mol of product will be formed.

So moles of product=moles of limiting reagent

Theoretical yield=Amount of product formed=moles of product* molar mass=moles of product *130.19 g/mol

Actual yield=amount of product formed in the laboratory by you.

Percent yield=actual yield/theoretical yield*100

second part

a)the equilibrium constant for Fischer esterification does not contain a term for sulfuric acid. because sulfuric acid is the catalyst in this reaction and its concentration remains unchanged during the reaction.

b) a) alcohol=CH3CH2CH2OH

        CARBOXYLIC ACID=CH3CH2CH(CH3)COOH

B) ALCOHOL=(CH3)CHCH2OH

ACID=CH3CH2CH2COOH

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