Question

Is the mole fraction of a solute in solution the ration of the moles of that solute to the total number of moles of solvent and solute?

Answer 1

It may be....

Explanation:

`chi_"the mole fraction"="moles of component"/"total moles in the solution"`

And so we dissolve `1*g` of sodium chloride in `100*g` of water....

`chi_"NaCl"=((1*g)/(58.44*g*mol^-1))/((1*g)/(58.44*g*mol^-1)+(100.0*g)/(18.01*g*mol^-1))=0.0031`

And so necessarily `chi_"water"=1-chi_"NaCl"=0.997`