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Explain why on the addition of 1 mol of NaCl

Question:

Explain why on the addition of 1 mol of NaCl to 1 litre of water, the boiling point of water increases, while the addition of 1 mol of methyl alcohol to one litre of water decreases its boiling point.

Solution:

On addition of 1 mol of NaCl to 1 litre of water, the boiling point of water increases, while the addition of 1 mol of methyl alcohol to one litre of water decreases its boiling

point because if a non-volatile solute like NaCl is added this happens. Methyl alcohol is volatile than water so it decreases the boiling point.

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