Addition of HgI2 to aq. KI solution shows an increase in the
vapour pressure why?
aditya kashyap , 11 Years ago
Grade upto college level
Physical Chemistry> Addition of HgI2 to aq. KI solution shows...
2 Answers
Tanu
Last Activity: 8 Years ago
HgI2 forms a complex with KI and therefore number of particles in the solution decreases.HgI2 + 2KI → K2[HgI4] Vapour pressure is a colligative property, decrease in number of solute particles will increase the vapour pressure. Therefore it will show increase in vapour pressure not decrease.
Rishi Sharma
Last Activity: 4 Years ago
Dear Student,
Please find below the solution to your problem.
KI forms a complex with HgI2.
2KI+HgI2⟶K2HgI4
Therefore, the number of particles in solution decreases resulting in the decrease in relative lowering of vapour pressure. Hence, vapour pressure increases.
Thanks and Regards
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