a solution is prepared by dissolving 15 g of sodium chloride in 200g of water. what is mass by mass percentage of salt in this solution
Mass of NaCl dissolved = 15g
Mass of water = 200g
Mass of solution = Mass of solute (NaCl) + Mass of solvent ( water is solvent here)
Mass of solution = 15 + 200 = 215g
Mass by mass percentage of solution = ?
As we know that,
Mass percentage of solution = (Mass of solute*100) / Mass of solution
So putting all the values of known quantities in above formula, we get:
Mass by mass percentage of solution = 15×100/215
Mass by mass percentage of solution = 6.97%
Hope you got the answer!