Calculate the concentration of the solution in mass percent: 122 g KCl in 628 g H2O.
To calculate the concentration of the solution in mass percent, we need to determine the mass of the solute (KCl) and the mass of the entire solution (KCl + H2O) first.
The mass of KCl is given as 122 g, and the mass of H2O is given as 628 g.
To get the mass of the entire solution, we add the masses of KCl and H2O:
Mass of the entire solution = mass of KCl + mass of H2O = 122 g + 628 g = 750 g.
Now, we can calculate the concentration in mass percent using the formula:
Concentration (mass percent) = (mass of solute / mass of solution) x 100.
Substituting the values, we get:
Concentration (mass percent) = (122 g / 750 g) x 100 = 16.27%.
Therefore, the concentration of the solution is approximately 16.27% (rounded to two decimal places) based on mass percent.