Distinguish between molality and molarity . Under what condition they are same
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Molarity and molality should be identical under the following conditions:
1. The density of the solvent is equal to 1g/mL.
2. The dissolution of the solute does not result in any change in the volume of a given amount of the solvent in which the solute is dissolved.
Since the density of water is 1g/mL, for aqueous solutions only the second condition needs to be met.
For an aqueous solution, molarity and molality should be almost equal when the concentration is very low.
1. The density of the solvent is equal to 1g/mL.
2. The dissolution of the solute does not result in any change in the volume of a given amount of the solvent in which the solute is dissolved.
Since the density of water is 1g/mL, for aqueous solutions only the second condition needs to be met.
For an aqueous solution, molarity and molality should be almost equal when the concentration is very low.
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