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The osmotic pressure of $0.010 M$ solutions of $\mathrm{CaCl}_{2}$ and urea at $25^{\circ} \mathrm{C}$ are 0.605 atm and 0.245 atm, respectively. Calculate the van't Hoff factor for the $\mathrm{CaCl}_{2}$ solution.

$2.46=i$

Chemistry 102

Chapter 12

Physical Properties of Solutions

Solutions

University of Central Florida

Rice University

Drexel University

University of Maryland - University College

Lectures

03:58

In chemistry, a solution is a homogeneous mixture composed of two or more substances. The term "solution" is also used to refer to the resultant mixture. The solution is usually a fluid. The particles of a solute are dispersed or dissolved in the solvent. The resulting solution is also called the solvent. The solvent is the continuous phase.

05:06

In physics and thermodynamics, the natural tendency of a system to change its state is its tendency to increase the entropy of the system. It is a measure of the disorder in a system.

02:25

The osmotic pressure of a …

06:48

02:24

A 0.100 $\mathrm{M}$ ionic…

Okay, so we want the Vinh Ha factor for a solution of calcium chloride. So let's first write down the equation for osmotic pressure because this is the information that is given on the problem. So pie, which is the osmotic pressure, is equally concentration. Multiple leader times the gas constant times, temperature times the ven half factor. Sometimes this factor might be omitted from the equation, but you must know that there's a correction for the dissociation or ionization off the Sawyer. Okay, so we actually have all the data we need. We have concentration. We have our tea pie we can solve for I. So let's write the equation. In terms of I, it will be Hi, oversee our team. Okay, so we can plug in the numbers. So let's start with the osmotic pressure. Demotic pressure is given for the solution. There are two solutions being described on this problem. We actually just need the data for the council chloride. So everything to do with the Yuria. Don't worry about it. You're not gonna use that they So the osmotic pressure for the caps and chloride is 0.605 18. Now the concentration will be point. 0 10 more for leader, the gas constant will be point. Oh, a Jew. That actually depends on the units that you decide to work with. I like this one because it's convenient for this type of problem. The units will be a T M leader, so you usually use for pressure and volume over calving. That's pretty much Stender. And who over, uh, mole. So I recommend that constant. Okay. And finally, you have temperature, so the temperature will be 298 killed. Kate, I converted. So this was the 25 7 You would do this converting so much in your life that you're gonna memorize the 25 years to 98. Okay, so all you have to do its compute this number. Ah, we can check if the units are mention so leaders, we cancer with these leaders. This small cancer with small. Kill me with this Calvin. A team with a gym. So there are no units left, which is correct because I is dimension list number. OK, it's just a number. So if you compute that, you should get something that it's approximately 2.5 and that serve Inhofe factor

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