Answer:
Mole fraction of KCl = 0.4056
Explanation:
We'll begin by calculating the number of mole of each compound. This can be obtained as follow:
For NaCl:
Mass NaCl = 0.564 g
Molar mass of NaCl = 58.44 g/mol
Mole of NaCl =?
Mole = mass /Molar mass
Mole of NaCl = 0.564 / 58.44
Mole of NaCl = 0.0097 mole
For KCl:
Mass KCl = 1.52 g
Molar mass of KCl = 74.55 g/mol
Mole of KCl =?
Mole = mass /Molar mass
Mole of KCl = 1.52 / 74.55
Mole of KCl = 0.0204 mole
For LiCl:
Mass LiCl = 0.857 g
Molar mass of LiCl = 42.39 g/mol
Mole of LiCl =?
Mole = mass /Molar mass
Mole of LiCl = 0.857 / 42.39
Mole of LiCl = 0.0202 mole
Next, we shall determine the total mole in the mixture. This can be obtained as follow:
Mole of NaCl = 0.0097 mole
Mole of KCl = 0.0204 mole
Mole of LiCl = 0.0202 mole
Total mole =?
Total mole = Mole of NaCl + Mole of KCl + Mole of LiCl
Total mole = 0.0097 + 0.0204 + 0.0202
Total mole = 0.0503 mole
Finally, we shall determine the mole fraction of KCl in the mixture. This can be obtained as follow:
Mole of KCl = 0.0204 mole
Total mole = 0.0503 mole
Mole fraction of KCl =?
Mole fraction of KCl = Mole of KCl /Total mole
Mole fraction of KCl = 0.0204 / 0.0503
Mole fraction of KCl = 0.4056
