The mole fraction of zinc chloride, ZnCl2, in an aqueous solution is 5.73×10-2 .
The percent by mass of zinc chloride in the solution is___%.
To find the percent by mass of zinc chloride in the solution, we first need to know the molar mass of zinc chloride, ZnCl2.
The molar mass of zinc chloride can be calculated by adding up the atomic masses of each element present. Zinc (Zn) has an atomic mass of 65.38 g/mol, and chlorine (Cl) has an atomic mass of 35.45 g/mol.
Now we can calculate the molar mass of zinc chloride:
Molar mass of ZnCl2 = (1 x atomic mass of Zn) + (2 x atomic mass of Cl)
Molar mass of ZnCl2 = (1 x 65.38) + (2 x 35.45)
Molar mass of ZnCl2= 65.38 + 70.90
Molar mass of ZnCl2 = 136.28 g/mol
Next, we can calculate the mass of zinc chloride in the solution by multiplying the mole fraction by the total mass of the solution. The mole fraction of ZnCl2 is 5.73×10-2.
Let's assume the total mass of the solution is 100 grams, so the mass of ZnCl2 in the solution is:
Mass of ZnCl2 = mole fraction x total mass of the solution
Mass of ZnCl2 = 5.73×10-2 x 100
Mass of ZnCl2 = 5.73 grams
Finally, we can calculate the percent by mass of zinc chloride:
Percent by mass of ZnCl2 = (mass of ZnCl2 / total mass of the solution) x 100
Percent by mass of ZnCl2 = (5.73 / 100) x 100
Percent by mass of ZnCl2 = 5.73%
Therefore, the percent by mass of zinc chloride in the solution is 5.73%.