Question

Determine the vapor pressure of 20 degrees celsius of a cane sugar solution C12H22O11 containing 10 g of sugar and 100 g of water.

Answer 1

Vapor pressure of water at 20°C is 2.3388 kPa

https://en.m.wikipedia.org/wiki/Vapour_pressure_of_water

By the Raoult's law

$P_i=\chi_i P_0$

$\chi_{H_2O}=\frac {100/18.0}{100/18.0+10/342.3}=0.995$

$P_{H_2O}=0.995×2.3388=2.327 kPa$