What is "volume percent" of a 10*g mass of solute dissolved in a 150*g mass of solvent?

1 Answer
Jul 22, 2017

Are you sure you mean to specify "volume percent"?

Explanation:

Normally we reserve the term for the concentration.......

"Volume of solute"/"Volume of solution"xx100%

And we have no handle on the volume of solute here........as it is commonly used for gas/gas or liquid/liquid solutions.

We could more properly quote concentration in terms of......

"Mass of solute"/"Mass of solute + mass of solvent"xx100%

(10*g)/(10*g+150*g)xx100%=6.25%("m/m").

WE could of course quote concentration in more familiar terms as..

"molarity"="Moles of solute"/"Volume of solution (L)".

And since, at these concentrations, volume change on dissolution would be negligible, we write........

((10*g)/(101.10*g*mol^-1))/(150*gxx1*mL*g^-1*10^-3L*mL^-1)=0.659*mol*L^-1.