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  3. Chemistry
  4. The molecular, mass of textNaCl as determined by osmotic pressure measurement is:

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Q. The molecular, mass of $ \text{NaCl} $ as determined by osmotic pressure measurement is:

VMMC MedicalVMMC Medical 2003

Solution:

$ \text{NaCl} $ is an ionic compound. It dissociates into ions in solution. As the osmotic pressure is a colligative property, hence observed osmotic pressure is always greater than the expected. Therefore, molecular weight is always obtained less than 58.5 (mol. wt. of $ \text{NaCl} $ ), as: $ PV=\frac{W}{M}.ST $