Chemical Kinetics and Nuclear ChemistryHard
Question
An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase ?
Options
A.Addition of NaCl
B.Addition of Na2SO4
C.Addition of 1.00 molal KI
D.Addition of water
Solution
Vapour pressure depends upon the surface area of the solution. Larger the surface area, higher is the vapour pressure.
Addition of solute decreases the vapour pressure as some sites of the surface are occupied by solute particles, result in decreased surface area. However, addition of solvent, ie, dilution, increases the surface area of the liquid surface, thus results in increased vapour pressure.
Hence, addition of water to the aqueous solution of (1 molal) KI, results in increased vapour pressure
Addition of solute decreases the vapour pressure as some sites of the surface are occupied by solute particles, result in decreased surface area. However, addition of solvent, ie, dilution, increases the surface area of the liquid surface, thus results in increased vapour pressure.
Hence, addition of water to the aqueous solution of (1 molal) KI, results in increased vapour pressure
Create a free account to view solution
View Solution FreeTopic: Chemical Kinetics and Nuclear Chemistry·Practice all Chemical Kinetics and Nuclear Chemistry questions
More Chemical Kinetics and Nuclear Chemistry Questions
If t1/2 of a second-order reaction is 1.0 h. After what time, the amount will be 25% of the initial amount?...Assuming that the charged particles emitted during natural decay of 92U235 atoms are a and b particles only, which of th...Rate of which type of elementary reaction increases with increase in temperature?...Decrease in atomic number is observed during :...When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of th...