Difference between molarity and molality

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Molarity Molality

It is the moles of solute present in 1 L of solution It is the moles of solute present in 1 Kg of solvent

It is represented by the symbol 'M' It is represented by the symbol 'm'

Its formula is mol/L Its formula is mol/Kg

Since volume is affected by the temperature, so molarity is affected by change in temperature Since mass is not affected by the temperature, so molality is not affected by change in temperature

It may not be accurate or precise It is very accurate and precise

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What is the difference between molality and molarity ?

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Molarity	Molality
It is the moles of solute present in 1 L of solution	It is the moles of solute present in 1 Kg of solvent
It is represented by the symbol 'M'	It is represented by the symbol 'm'
Its formula is mol/L	Its formula is mol/Kg
Since volume is affected by the temperature, so molarity is affected by change in temperature	Since mass is not affected by the temperature, so molality is not affected by change in temperature
It may not be accurate or precise	It is very accurate and precise