1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# Liquids A and B form ideal solution over the entire range of composition. At temperature T, equimolar binary solution of liquids A and B has vapour pressure 45 torr. At the same temperature, a new solution of A and B having mole fractionsXA and XB , respectively, has vapour pressure of 22.5 torr. The value of XA / XB in the new solution is: (Given that the vapour pressure of pure liquid A is 20 Torr at temperature T)

A
19.00
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
19
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
19.0
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

## XA=12,XB=12 PT=P0A×12+P0B×12 (Given P0A=20) 90=45×2=P0A+P0B.....(1) P0B=90−20=70 22.5=p0AXA+P0B(1−XA) =20XA+70(1−XA) 22.5=20XA+70−70XA=70−50XA XA=47.550=1920 XB=120 XAXB=1920120=19

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Reactions in Solutions
CHEMISTRY
Watch in App
Explore more
Join BYJU'S Learning Program