Question

(a) Define molality with unit.

(b) How many moles of NaCl is present in 500 mL of centimolar NaCl (aq) solution?

(c) An aquous solution of K2SO4 where the mole fraction solute is 0.46. What will be the mole fraction of solvent (H2O)​

Answer 1

Answer:

a)Molality is a measure of number of moles of solute present in 1 kg of solvent. ... A commonly used unit for molality in chemistry is mol/kg. A solution of concentration 1 mol/kg is also sometimes denoted as 1 molal.