Assignment:
A sample of a mixture containing only sodium chloride and potassium chloride has a mass of 3.5650g. When this sample is dissolved in water and excess silver nitrate is added, a white precipitate (silver chloride) forms. After filtration and drying, this precipitate has the mass 7.9143g.
What is the mass percentage of sodium chloride in the mixture?
Provide complete and step by step solution for the question and show calculations and use formulas.