Question

rsE s s-soNDING IN A HOLECULE OF ACETONE de f Laboratory Z Preparation of Acetanilide PRELAB ASSIGNMENT Page 1 of 1 Student Name: Date: Section: Course: 1. a). What is the theoretical vield of the product Cif 0.050 moles of A and 0.20 moles of B are used in the following reaction? (MW of product C is 110 g/mole) AB C b). If you produce 4.6 grams of product C what is your percent yield? List, in the correct order, the steps of a recrystallization procedure. 2. a) vacuum filter to isolate product b) dissolve in minimal amount of hot solvent c) cool slowly to allow crystals to form d) gravity filter hot solution The correct order is: ei

Answer 1

1)

A + B -------> C

Number of moles of A is 0.050 mol

Number of moles of B is 0.20 mol

Here the Limiting reagent is A. Becuase it is present in low amount.

Theoretical yield of C :

0.050 mol C × ( 1 mol C / 1 mol A) × ( 110 g C / 1 mol C)

= 5.5 g C

Theoretical yield of C is 5.5 g

b)

Percent yield = (Actual yield / theoretical yield ) ×100%

Percent yield = (4.6 /5.5)×100%

Percent yield = 83.6 %