How does the number of osmoles factor in when trying to calculate the molar mass of...
- How does the number of osmoles factor in when trying to calculate the molar mass of a substance?
Homework Answers
Osmotic pressure is a colligative property which depends on the number of solute particles present in the solution. When a substance is dissolved in a solvent and it undergoes dissociation or association then the number of particles present in the solution changes thus the expected and actual values of osmotic pressure are found to be different. So we have to incorporate the osmole factor which tell us about the number of constituent particles in a solute while determining the molar mass of solute.
Osmotic pressure = I x C xR xT,
C = mole/volume , mole = weight / molar mass.
I = osmole factor.
Eg. NaCl has I= 2
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