A-If 2.0 g of isopentyl alcohol is reacted with 10 mL of acetic acid and 2 drops

Question

A-If 2.0 g of isopentyl alcohol is reacted with 10 mL of acetic acid and 2 drops of sulfuric acid, which reagent is the limiting reagent?

B-If 2.00 g of isopentyl alcohol is reacted with 10.0 mL of acetic acid and 2 drops of sulfuric acid, what is the theoretical yield? Report your value to TWO decimal places (x.xx g).

C-In the lab 2.0 g of isopentyl alcohol is reacted with 10 mL of acetic acid and 2 drops of sulfuric acid. After workup and purification, a student obtains 1.1214 g of banana oil (isopentyl acetate). What is the percent yield for this reaction? Report your value to one decimal place (xx.x%)

Explanation / Answer

A) Isopentyl alcohol is limiting reagent because this is taken less compare to acetic acid

B) theoretical yield

            theoretical yield of product = wt* no.of moles of starting material

           => no. of moles of isopentenyl alcohol = wt/ molecular weight

                                                                   = 2.0/ 88.15

                                                                   = 0.0266 mols/g

then, theoretical yield of product = 0.0266* 130.18

                                                = 3.46 g

C) percentage yield = obtained yield/ theoretical yield * 100

                        = 1.121/ 3.46* 100

                        = 32.39 %

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