it is given that the mass of 2 mol particle( KCl ) is 74.5 and the mass of one mole of KCl would be 37.25 (dissociation of KCl)
can someone please explain the abnormal molar mass from this?
Answers
Answer:
sorry,i didn't understand your question
explain it briefly
next time i will do it.
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bye
Answer:
Explanation:
This factor represents the extension of dissociation or association of a solute. This factor alone accounts for all the abnormalities in the molar mass. We will study about the Van’t Hoff’s factor later on, but first, we need to know about the association and dissociation of the solute particles.
van't hoff factor
Association of the Solute Particles
In a solution, some solute molecules start to associate with each other. Thus, now there is less number of these particles inside a solution. The colligative properties will vary with a number of solute particles in the solution. As a result, they will now, start to decrease with the number of solute particles being less.
The molecular mass of the solute is inversely proportional to its colligative properties. Thus a decrease in colligative properties will lead to an increase in the molecular masses.
Example: acetic acid or ethanoic acid associate in the solution, when dissolved in benzene, dimerizes, because the number of particles and hydrogen bondings are reduced. This happens usually with the solvents which have low dielectric constants. This experiment increases the molar mass more than the expected value achieved theoretically.