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Depression in Freezing Point

Why C is term...

Question

Why C is termed as molarity of solution in osmotic pressure relation (Pi=CRT). not molality?

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Solution

Dear student!
Actually the osmotic pressure is explained as:
Pi = n RTi/V
Where n is the no. of moles per unit volume so n/V is the molar concentration and called a smolarity (when volume is considered)
Here n/V is replaced by term "C" so it has been called as "molarity" and not as "molality".

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