A solution is prepared by dissolving 15grams of table salt in 70grams of water. Find (a) mass percent of solute (b) mass percent of solvent.

Answer 1

% w/w means (grams solute/grams solution)*100 = ?

[(15g NaCl/(70+15)]*100 = % NaCl
{(70g H2O/(70+15)]*100 = % H2O