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

The mass of non-volatile, non-electrolyte solute (molar mass 50gmol1) needed to be dissolved in 114g octane to reduce its vapour pressure to 75%, is ___________.

A
150g
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
75g
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
37.5g
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
50g
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 150g
Octane has molar mass of 114 g/mol.

ΔPP=W2M2W2M2+W1M1

75100=W250g/molW250g/mol+114g114g/mol

0.75=W250W250+1

W250+1=W250×0.75

W2=150 g

Note : W2 and M2 are mass and molar mass of solute and W1 and M1 are mass and molar mass of octane.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Liquids in Liquids and Raoult's Law
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon