Question

Mole fraction of water in 80% kcl by mass of solution

Answer 1

Answer:

0.5

Explanation:

moles of kcl = 80÷74.5 = 1.07  (kcl = 39+35.5 = 74.5)        

moles of h2o = 20÷18 = 1.1   (h2o =16+2 = 18 )

mole fraction of water = mole of water ÷ ( moles of kcl +water)

                                       = 1.1 ÷(1.07 +1.1)

                                       = 0.5