Molality is defined as the mole of the solute dissolved in one kilogram of solute.
Example: -
A solution of caustic soda contains 20 % NaOH by weight of a solution. The density of the solution is 1.196kg/lit. Find the molality
Solution ⇒
Given: - 20 % NaOH in the caustic soda solution
Basis: - 100 kg of solution
Formula:-
As the Solution contains 20 % of NaOH
∴ Weight of NaOH = 100 * 0.2 = 20 kg.................(1)
Weight of water (solvent ) = 100 - 20 = 80 kg..............(2)
As we know
∴ Weight of NaOH = 100 * 0.2 = 20 kg.................(1)
Weight of water (solvent ) = 100 - 20 = 80 kg..............(2)
As we know
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