23. A 0.116M ionic solution has an osmotic pressure of 7.8atm at 38 ? C. A. Calc
ID: 785975 • Letter: 2
Question
23. A 0.116M ionic solution has an osmotic pressure of 7.8atm at 38?C.
A. Calculate the van't Hoff factor (i) for this solution.
24. Calculate the vapor pressure at 25 ?C of an aqueous solution that is 5.80% NaCl by mass.
25. Potassium perchlorate (KClO4) has a lattice energy of -599 kJ/mol and a heat of hydration of -548 kJ/mol.
A. Find the heat of solution for potassium perchlorate when 10.5g of potassium perchlorate is dissolved with enough water to make 104.9mL of solution.
B. Determine the temperature change that occurs when 10.5g of potassium perchlorate is dissolved with enough water to make 104.9mL of solution. (Assume a heat capacity of 4.05 J/g??C for the solution and a density of 1.05 g/mL.)
26. A saturated solution was formed when 5.85
Explanation / Answer
28)Boiling pint elevation constant for water = 0.512
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