What is difference between molality and …
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Akshay Koni 6 years, 8 months ago
- 1 answers
Related Questions
Posted by Aastha Tiwari 11 hours ago
- 0 answers
Posted by Rozee Leimapokpam 3 weeks, 3 days ago
- 1 answers
Posted by Aditya Verma 2 weeks, 6 days ago
- 1 answers
Posted by Tulsi Sahu 2 weeks, 4 days ago
- 0 answers
Posted by Aryan Raut 3 weeks, 3 days ago
- 0 answers
Posted by Nikhil Shukla 3 weeks, 2 days 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
Jatin Singh 6 years, 8 months ago
Molality vs. Molarity:
These two words sound similar but they are not synonyms, even though both of them are used for representing solution concentration. By definition, molarity is the number of moles of solute dissolved per liter of solution. We use capital letter “M” to represent molarity and its formula is M= (# mol SOLUTE)/ (Liters of SOLUTION).
Molality is then the number of moles of solute per kilogram of the SOLVENT, NOT solution! We use lower case letter “m” to represent molality and its formula can be represented as: m= (# mole SOLUTE) / (Kilograms of SOLVENT).
Most of the time scientists use either molarity or molality to represent solution concentration, but MOLALITY is preferred when the temperature of the solution varies. That is because MOLALITY does not depend on temperature, (Neither number of moles of solute nor mass of solvent will be affected by changes of temperature.) while MOLARITY changes as temperature changes. (Volume of solution in the formula changes as temperature changes, and that is why.)
0Thank You