Question

How to show sum of the mole fraction of components equal to 1?

Answer 1

mole fraction=no.of moles of a solute / total no.of moles in solution 

suppose no of moles of solute is n1..that of solvent is n2
corresponding mole fractions will be n1/n1+n2 and n2/n1+n2
then, sum of mole fractions will be: 
n1/n1+n2 + n2/n1+n2 =1

Answer 2

Answer:

mole fraction=no.of moles of a solute / total no.of moles in solution

suppose no of moles of solute is n1..that of solvent is n2

corresponding mole fractions will be n1/n1+n2 and n2/n1+n2

then, sum of mole fractions will be:

n1/n1+n2 + n2/n1+n2 =1