Question

If 10.0 grams of sodium sulfate are dissolved in 90.0 grams of water, the percent (w/w) sodium sulfate in the resultant solution is: Select one: O a: 10.0 % (w/w) o b. 9.00 % (w/w) O c. 90.0 % (w/w) d. 1.0 % (w/w) e. 9.0 M

Answer 1

Percent w/w is nothing but percentage of solute in resulting solution. Since the total mass of solution will be

10.0 g + 90.0 g = 100.0 g solution

% w/w = (weight of solute/weight of solution) * 100

% w/w = (10.0/100.0) * 100 = 10.0% w/w

Therefore option 1st is correct from given option.

All other option with given work are not matches. Therefore other options are incorrect.