Calculate the concentration of the solution in mass percent: 9.95 g C2H6O in 65.1 g H2O.
To calculate the concentration of the solution in mass percent, you need to find the mass of the solute (C2H6O) and the mass of the solution (C2H6O + H2O), and then calculate the percentage.
First, let's find the mass of the solute (C2H6O), which is given as 9.95 g.
Next, let's find the mass of the solution, which is the sum of the masses of the solute and the solvent (H2O). The mass of H2O is given as 65.1 g.
So, the mass of the solution is:
Mass of solution = Mass of C2H6O + Mass of H2O
= 9.95 g + 65.1 g
= 75.05 g
Now, let's calculate the concentration in mass percent. Mass percent is defined as the mass of the solute divided by the mass of the solution, multiplied by 100.
Concentration (mass percent) = (Mass of C2H6O / Mass of solution) x 100
Substituting the values we found:
Concentration (mass percent) = (9.95 g / 75.05 g) x 100
= 13.26%
Therefore, the concentration of the solution is 13.26% (rounded to two decimal places).