Question

the mole fraction of the solute having its molality 4.45m in aqueous solution
a)0.02
b)0.07
c)0.05
d)0.2​

Answer 1

Answer:

According to me, 2.5 molal aqueous solution means 2.5 moles of solute in 1 kg solvent,

⇒ moles of solute=2.5

moles of water=1000/18=55.55

(1000/ H2O as water has 18)

so mole fraction = 2.5/(2.5+55.55)

=(moles of solute/ moles of solute +solvent)

=0.043(approx)

Hope it helps…