(van’t hoff) use van’t hoff to calculate freezing and boiling points; don’t know what went wrong

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(van’t hoff) use van’t hoff to calculate freezing and boiling points; don’t know what went wrong
If the osmotic pressure of a 7.68x10-2-M aqueous solution of KCI was found to be 3.38 atm at 20°C, what would be the "observed" van't Hoff factor?
1.83
You are correct.
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Your receipt no. is 159-263 ?
Use the above van't Hoff factor to predict the freezing point of this solution.
Note that the corresponding molality would be 7.75×10-2 m, given that the density of the solution is 0.997 g/cm3.
°C
Ke for water is 1.86°C Kg/mol.
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Incorrect. Tries 6/99 Previous Tries
Use the above van't Hoff factor to predict by how many degrees the boiling_point of this solution will be elevated above that for pure water.
°C
Submit Answer
Tries 0/99
Transcribed Image Text:If the osmotic pressure of a 7.68x10-2-M aqueous solution of KCI was found to be 3.38 atm at 20°C, what would be the "observed" van't Hoff factor? 1.83 You are correct. Previous Tries Your receipt no. is 159-263 ? Use the above van't Hoff factor to predict the freezing point of this solution. Note that the corresponding molality would be 7.75×10-2 m, given that the density of the solution is 0.997 g/cm3. °C Ke for water is 1.86°C Kg/mol. Submit Answer Incorrect. Tries 6/99 Previous Tries Use the above van't Hoff factor to predict by how many degrees the boiling_point of this solution will be elevated above that for pure water. °C Submit Answer Tries 0/99
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