Question

Please Help - Percent By Mass Problems?

Calculate the percent by mass of pure NaCl in the following mixtures.
(a) 2.2 g NaCl in 49.4 g aqueous solution

__ % NaCl

Answer 1

Well, this is an old problem....

Explanation:

We could approach the solution as either...

`(i)` `"Mass of solute"/"Mass of solution"xx100%`

or....

`(ii)` `"Mass of solute"/"Volume of solvent"xx100%`

Likely `(i)` is the approach you want.....

And so we gots...`(2.2*g*"solute")/(49.4*g*"solution")xx100%=??%`