Question

When 10g of naoh is dissolved in 500g of water,calculate the molality of the solution?

Answer 1

Answer:

moles of NaOH = 10 g NaOH ×

1

mol NaOH

40.00

g NaOH

= 0.25 mol NaOH

kilograms of H₂O = 500 g H₂O ×

1

kg H₂O

1000

g H₂O

= 0.500 kg H₂O

molality =

moles of solute

kilograms of solvent

=

0.25

mol

0.500

kg

= 0.50 mol/kg