Soap is created by mixing fats and oils with a base as opposed to detergent which is created by combining chemical compounds in a mixer.
Potassium is placed where it is based on its properties and it's reactivity. It's also placed there based on it's atomic number.
To separate off different products in order of their boiling points. You do it by a process of heating and cooling in a horizontal condenser usually.
it is already balanced
REACTANTS
Barium sulfide (BaS) + platinum (Ii) fluoride
PRODUCT
Barium fluoride (BaF2) + Cooperite (PtS)
Hope this answer helps you dear! take care