Question

Mole fraction of NaOH in 5 molal aqueous solution of NaOH is

Answer 1

1 mol NaOH =40g

thus

5 mol NaOH =40×5 = 200g

water present = 1000-200=800 g

mole of water =800/18=44.5

mole fraction of NaOH=5/5+44.5

ans =0.101