can anyone help me with this post lab? organic Chemistry Lab Experiment 5- Bromi

Question

can anyone help me with this post lab?
organic Chemistry Lab Experiment 5- Bromination/Debromination of Cholesterol Post-Lab Worksheet Name Lab Section_ 1. Fil n the following table and calculate the percent yield of your dibromocholesterol product and the final cholesterol product. Show your calculations. (15 points) Mass of commercial cholesterol Mass of dibromocholesterol Mass of cholesterol product %yield di % yield cholesterol 2. Calculate the percent recovry of cholesterol. Show your calculations. (10 points) 3. Report the melting point of your starting cholesterol, your experimental dibromocholesterol uct, and your final cholesterol product along with literature melting point values for these compounds in the table below. (5 points) Compound Commercial cholesterol Dibromocholesterol Experimental Cholesterol Experimental melting point Literature melting point 151-1%" According to your melting point results was the bromination/debromination effective for purification- of cholesterol? Explain. (5 points)

Explanation / Answer

dibromocholesterol molecular weight -           544.446 g/mol

cholesterol molecular weight – 386.65 g/mol

= (0.109 x386.65)/(544.446)

=0.077 g Cholecterol

Now % yield of cholesterol =( 0.077/0.109 ) * 100 = 70.64 % yeild

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Percent recovery is used in cases where no chemical reaction is taking place, as in purification of a sample. It is calculated as follows:

% recovery =( amount pure product recovered (g) / amount of crude material used (g)) x 100

now you have not given amount of product you get. place the reading and calculate you will get % recovery.

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