Relation between molarity and molality?
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Subham Sahu 6 years, 1 month ago
- 2 answers
Divya Shrivastav 6 years, 1 month ago
Test
Related Questions
Posted by Kashish Baisla 1 year, 1 month ago
- 1 answers
Posted by Roshni Gupta 1 year, 9 months ago
- 0 answers
Posted by Priya Dharshini B 1 year, 8 months ago
- 4 answers
Posted by Prity Rani Mishra 1 year, 9 months ago
- 0 answers
Posted by Shikhar Manav 1 year, 9 months ago
- 0 answers
Posted by Account Deleted 1 year, 9 months ago
- 0 answers
Posted by Karan Kumar Mohanta 1 year, 8 months ago
- 1 answers
Posted by Mahi Sharma 1 year, 9 months ago
- 0 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Yogita Ingle 6 years, 1 month ago
Let the mass of given solute be W.
Let the volume of the solution be V.
Let the molality be m.
Let the molar mass of solute be M’.
Let the Molarity be M.
Let the weight of the solvent be W’.
Therefore the Molarity, M = W/M′∗1000/V ………(1)
Therefore the molality, m = W/M′∗1000/W′ …….(2)
Density, d = M/V
= (W+W′)/V
From (1)
V = W∗1000MM′ …………. (3)
From (2)
W’ = W∗1000/mM′
Therefore,
W+W’ = W+W∗1000/mM′ 1000M′[mM′1000m+1m]W′ …………(4)
By dividing equation (4) by (3) we get,
dM=1/m+M′1000 1/m=d/M−M′1000 m=M∗1000/(d∗1000)−M(M′)
Hence the relation between molality and Molarity proved.
2Thank You