Asked by Jenny

What is the percent by mass of a solution if 45 grams of acetic acid is added to 90 g of H2O?
Thanks.
Answered by DrBob222
% w/w means (grams solute/100 g soln)*100 = %.

You have 45 grams of the solute and (45 + 90 g soln) so
(45/135)*100 = ??