Question

if 4g of Naoh is dissolved in 18g of water .find molality of the solution

Answer 1

In 4g NaOH,
Number of moles =4/40=0.1 moles
Mass of water=18g
Molality of solution =moles of solute/mass of solvent in kg = 0.1×1000/18 = 5.55 mol/kg