Describe the relationship between a solution's vapor pressure and the number of particles the solute makes in a solution. The decrease in a solution's vapor pressure is proportional to the number of particles the solute makes in a solution.
Answer: Increase in concentration of particles in a solution will decrease the vapor pressure of the solution.
Explanation:
Vapor pressure is the colligative property. Colligative property is the property of ideal solutions which depend on the number of particles of the solute that is dissolved in a definite amount of solvent and does not depend on the nature of the solvent.
When concentration of solute particles increases, there is relative lowering in the vapor pressure of the solution because less number of solvent particles will be available o the top of solution.
Equation for the relative lowering of vapor pressure:
[tex]\frac{p^o-p_s}{p^o}=\frac{n_2}{n_1+n_2}[/tex]
where,
[tex]p^o[/tex] = vapor pressure of pure solvent
[tex]p_s[/tex] vapor pressure of the solution
[tex]n_2[/tex] = number of moles of solute
[tex]n_1[/tex] = number of moles of solvent
