Question

when 1 mole of nacl is added to 1 l of water the boiling point decreases ?​

Answer 1

Answer:

NaCl is a non-volatile solute, therefore, addition of NaCl to water lowers the vapour pressure of water. As a result boiling point of water increases. On the other hand, methyl alcohol is more volatile than water, therefore its addition increases the total vapour pressure over the solution. As a result, boiling point of water decreases.

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Answer 2

Your answer is given below -::::

NaCl is nonvolatile solute. When NaCl is added to water, the vapor pressure of the water decreases , therefore the boiling point of water increases. Whereas methyl alcohol is a volatile solute with a higher vapor pressure than water. Therefore, the vapor pressure of water increases thus, the boiling point decreases.