On the basis of 12th class define molality???
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Molality is considered better for expressing the concentration as compared to molarity ,because the molarity changes with temperature because of expansionor contraction of the liquid with temperature .How ever , molality does not change with temperature because mass of the solvent does not change in temperature
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Molality define as the number of mole of substance in per litre of solution.
molality does not depend on temperature.
Molality = molarity *acidity /baseicity .
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