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Ch.13 - Solutions

Chapter 13, Problem 95

A 0.100 M ionic solution has an osmotic pressure of 8.3 atm at 25 °C. Calculate the van't Hoff factor (i) for this solution.

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Hello everyone today. We have been given the falling problem, calculate the van Hoff factor of a solution that is a concentration of .215 moller and osmotic pressure of 6.5 atmospheres at 25°C. So the calculation formula for this is going to be the automatic pressure is equal to the Van Hoff factor times the morality times the gas constant, R times our temperature T. And that's going to be in kelvin. So if we rearrange this equation, we will end up with the following equation at the Van Hoff factor is equal to Our pressure, which is 6.5 atmospheres over The rest of our factors, which is going to be on polarity, which is .215 polarity times are gas constant Which is 0.80206 Leaders times, atmospheres over moles, kelvin Multiplied by our temperature which has to be in Kelvin. So we added 217.15 to our 25°C. And that's going to give us a van Hoff factor value of 1.24. And with that we've answered our question overall, I hope this helped. And until next time