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Question: What is the number of moles of ethane obtained from 2n moles of bromomethane using 2n moles of sodiu...

What is the number of moles of ethane obtained from 2n moles of bromomethane using 2n moles of sodium atoms in dry ether medium?

A

4n

B

3n

C

2n

D

n

Answer

n

Explanation

Solution

In the Wurtz reaction, two moles of bromomethane react with 2 moles of sodium to yield 1 mole of ethane:

2 CH3Br+2 Na→CH3CH3+2 NaBr2\, \text{CH}_3\text{Br} + 2\, \text{Na} \rightarrow \text{CH}_3\text{CH}_3 + 2\, \text{NaBr}

Given 2n moles of bromomethane, the number of moles of ethane produced will be:

2n2=n moles\frac{2n}{2} = n \text{ moles}