Calculate the mass percent of solute in each of the solutions. 2.77 g KCl dissolved in 49.6 g H2O

Answer 1

Mass percent essentially means how many grams of solute are there in 100 g of solution.

2.77 g KCl in 49.6 g H2O

Total mass of this solution = 2.77 g + 49.6 g = 52.37 g

So, mass % requires us to find g KCl in 100 g of solution:

2.77 g KCl/52.37 g soln (x 100 g solution) = 5.29 g KCl/100 g solution = 5.29 mass percent