December 11, 2023, 05:58:10 PM
Forum Rules: Read This Before Posting

Topic: Solutions: osmotic pressure, molarity, ion pairs  (Read 2957 times)

0 Members and 1 Guest are viewing this topic.

Offline k42490

  • Regular Member
  • ***
  • Posts: 15
  • Mole Snacks: +0/-1
Solutions: osmotic pressure, molarity, ion pairs
« on: December 22, 2007, 09:10:01 PM »
Given: an aqueous solution is 1 % NaCl by mass and has a density of 1.071 g/cm3 at 25 degrees C. The observed osmostic pressure is 7.83 atm at 25 degrees C.

What fraction of the moles of NaCl in the solution exist as ion pairs?
Calculate the freezing point that would be observed for the solution.

Offline IITian

  • Regular Member
  • ***
  • Posts: 74
  • Mole Snacks: +4/-2
  • Materials & Chemical Engineer
Re: Solutions: osmotic pressure, molarity, ion pairs
« Reply #1 on: December 23, 2007, 07:00:52 AM »
The extent of freezing-point depression can be calculated by applying Clausius-Clapeyron relation and Raoult's law together with the assumption of the non-solubility of the solute in the solid solvent. The result is that in dilute ideal solutions, the extent of freezing-point depression is directly proportional to the molal concentration of the solution.

Sponsored Links