Question

a solution contains 200g of naoh in 1800 g of water . calculate mole fractionnof naoh

Answer 1

No. of moles of NaOH = 200/40

                                      = 5 moles

No of moles of water = 1800/18

                                  = 100 moles

Mole fraction of NaOH = Moles of NaOH/ Moles of solution

                                      = 5/105

                                      = 1/ 21

                                      = 0.047 is the mole fraction of NaOH