Benzyl is yellow and benzophenone is white. If I added a solution of benzyl and

Question

Benzyl is yellow and benzophenone is white. If I added a solution of benzyl and benzophenone the top of a chromatography column made with silica, I could use a convent that allowed the A student begins with 0.30g of triphenyl bromomethane. The student obtains 0.15 g of triphenylmethanol. What is the percent yield for this reaction? Br = 80g/mol; C = 12 g/mol, O = 16g/mol. Choose two reactions that you conducted in lab, draw them below and state what change the IR or NMR could be used to demonstrate that the reactant was converted to product. Draw the mechanism for the formation of carbonic acid from sodium carbonate and HCL

Explanation / Answer

Percent yield = (actual yield/theoretical yield) × 100

Actual yield obtained = 0.15g of triphenyl methanol

Initial amount of triphenyl bromomethane used =0.30g

Molar mass of triphenyl bromomethane (C19H15Br) = 12×19+15×1+80 =323.2g/mol

Molar mass of triphenyl methanol (C19H16O) = 12×19+1×16+16 = 260.3g/mol

So, 323.2g of triphenyl bromomethane produce 260.3g of triphenyl methanol

So,0.30g of triphenyl bromomethane will produce (260.3/323.2)×0.30g of triphenylmethanol

Thus theoretical yield of triphenylmethanol =0.242g

Thus,percent yield = (0.15/0.242) × 100 = 61.98%

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