Its urgent.......Calculate the mole fraction of ethanol and water in a

1.	Its urgent.......Calculate the mole fraction of ethanol and water in a sample of rectified spirit which contains 46% ethanol by mass
Answer» Answer: the QUESTION states that the solution has 92% ETHANOL by mass so if the solutions WEIGHS 100gms , it CONTAINS 92gms of ethanol and 8gms of water no.of moles of ethanol = weight of ethanol / molecular weight of ethanol molecular weight of ethanol is 46 no. of moles of ethanol is 92/46 i.e 2 no.of moles of water is 8/18 i.e 0.222 mole fraction of ethanol = no.of moles of ethanol / total number of moles = 2/2.222 =0.90 (approx) mole fraction of water =1-mole fraction of ethanol =1-0.9 =0.1 (approx

Its urgent.......Calculate the mole fraction of ethanol and water in a sample of rectified spirit which contains 46% ethanol by mass

Answer»

Answer:

the QUESTION states that the solution has 92% ETHANOL by mass

so if the solutions WEIGHS 100gms , it CONTAINS 92gms of ethanol and 8gms of water

no.of moles of ethanol = weight of ethanol / molecular weight of ethanol

molecular weight of ethanol is 46

no. of moles of ethanol is 92/46 i.e 2

no.of moles of water is 8/18 i.e 0.222

mole fraction of ethanol = no.of moles of ethanol / total number of moles

= 2/2.222

=0.90 (approx)

mole fraction of water =1-mole fraction of ethanol

=1-0.9

=0.1 (approx