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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

Serenity Allen

It may be....

#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#

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Answer 2

Cooper Anderson

No, it is the ratio of moles of the solute to the total moles of all components in the solution.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.