You are preparing triphenyl carbinol by a grginard synthesis. First you prepare methyl benzoate, and set...

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Chemistry

You are preparing triphenyl carbinol by a grginard synthesis.First you prepare methyl benzoate, and set aside 4.40 grams of thepurified ester for later use. You then prepare the grignard reagent( phenylmagnesium bromide ) by reacting 1.78 grams of magnesiumwith 12.01 ml of bromobenzene. You add the 4.40 grams of methylbenzoate to the freshly prepared grignard reagent to form anaddition product. Finally, after hydrolyzing the grignard additionproduct, you obtain 5.27 grams of the final product, triphenylcarbinol. What is the percent yield of triphenyl carbinol ? ( Thedensity of bromobenzene is 1.495 g/ml ) (molecular weights:bromobenzene = 157, methyl benzoate=136, magnesium =24.3, triphenylcarbinol =260)

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Solution Given dataMass of Mg 178 gVolume of bromobenzene 1201 ml d1495 g mlMass of bromobenzene 1201 ml 1495 g per ml 1795 gMass of the methyl benzoate 440 gBalanced reaction equation for the reaction is shown in thefollowing imageLets first calculate the moles of the each reactantMoles of Mg 178 g 243 g per mol 00732 mol MgMoles of Bromobenzene 1795 g 157 g per mol 01143 See Answer

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