Question

How many litres of ethene would be produced when 2.62g of vinyl magnesium bromide is treated with 224ml of ethyne at STP.

• A. 0.224 litre
• B. 0.08 litre
• C. 0.448 litre
• D. 1.12 litre

Answer 1

The correct option is A 0.224 litre

As from reaction, we can see that one mole of Grignard reagent reacts with one mole of ethyne and one mole of ethene forms.
Here, moles of Grignar reagent $=\left(2.62/131\right)=0.02$ mole.
Moles of ethyne $=(224/22400=0.01$ mole
So here ethyne is limiting reagent and 0.01 mole of ethene will be form as a product.
Volume of ethene produced $=0.01\ast 22.4=0.224$ lit.