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

1 Answer
Jul 22, 2017

Answer:

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.#