Question

Procedure followed:

CaC2 to Gas X to Benzene

By IR spectroscopy on a liquefied sample of the reaction product, it was found that not all the amount of X gas was converted to benzene.

To confirm and verify the composition of ethyne and benzene mixture, in 5 g of the mixture, cold bromine solution was added. 8g of bromine was required for complete reaction.

1)Calculate the composition of the sample in 2 substances 2)Calculate the impurity content of CaC2. if for the preparation of the 5g mixture, 15g of hydrocarbon was completely hydrolyzed.

1 mol Br2 =160 g

x. =8g

x= 0,05 mol

1 mol ethyne reacts with 2mol Br2

x=0,025mol. 0,05 mol

1 mol ethyne =26g (Mr)

0,025 mol. =x

x=0,65g

5-0,65=4,35g benzene

.......

Answer 1