Question

The value of unit weight of water is always taken as unity. Why?​

Answer 1

Answer:

For solids or liquids, as mass decreases the volume also decreases by a proportional amount. 1000L water and 10mL water both have molar densities of 55.5 mol/L. So molar density variations are minimum and hence the variations in molar activity is minimum. So the activity coefficient is taken as unity.

Answer 2

Answer:

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Explanation:

For solids or liquids, as mass decreases the volume also decreases by a proportional amount. 1000L water and 10mL water both have molar densities of 55.5 mol/L. So molar density variations are minimum and hence the variations in molar activity is minimum. So the activity coefficient is taken as unity.

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