You are running a rather large scale reaction where you prepare the grignard reagent phenylmagnesium bromide by reacting 210.14 grams of magnesium with 772 ml of bromobenzene. How many moles of grignard reagent would you expect to form? (the density of bromobenzene is 1.495 g/ml, Mg = 24.3 g/mol, bromobenzene=157.01 g/mol)

Question
Asked Nov 9, 2019

You are running a rather large scale reaction where you prepare the grignard reagent phenylmagnesium bromide by reacting 210.14 grams of magnesium with 772 ml of bromobenzene. How many moles of grignard reagent would you expect to form? (the density of bromobenzene is 1.495 g/ml, Mg = 24.3 g/mol, bromobenzene=157.01 g/mol)

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Expert Answer

Step 1

Given:

Mass of Mg = 210.14 g

Volume of bromobenzene = 772 ml

the density of bromobenzene = 1.495 g/ml

Chemical reaction is given by,

Br
MgBr
Mg
Phenylmagnesium
bromide
Bromobenzene
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Br MgBr Mg Phenylmagnesium bromide Bromobenzene

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Step 2

Calculation for mass of bromobenzene:

Mass = density × volume

Mass = 1.495 g/ml × 772 ml

Mass = 1154.14 g.

Step 3

Calculation for number ...

mass
number of moles
molar mass
210.14 g
number of moles
24.305 g/mol
number of moles 8.646 moles
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mass number of moles molar mass 210.14 g number of moles 24.305 g/mol number of moles 8.646 moles

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