Question

4 gram caustic soda is dissolved in 500 gram water find out molality of solution

Answer 1

Answer:

The molality is 0.50 mol/kg

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

Explanation:

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