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Calculate the van't Hoff factor of $\mathrm{Na}_{3} \mathrm{PO}_{4}$ in a $0.40 \mathrm{m}$ solution whose freezing point is $-2.6^{\circ} \mathrm{C}$.

$$3.5$$

Chemistry 102

Chapter 12

Physical Properties of Solutions

Solutions

Carleton College

University of Kentucky

Brown University

University of Toronto

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.

02:40

A 1.0 $\mathrm{m}$ solutio…

00:52

A $0.118 \mathrm{~m}$ solu…

02:39

What is the van't Hof…

01:41

What is the freezing point…

04:00

Calculate the freezing poi…

Okay, So the variation in the freezing point is equals the freezing point depression, constant times the morality of the solution times the vin half factor. And this is what we want to figure out in this question. So this is our go. So we can rearranged his equation such that I is just alone in one side. And that will be like this minus delta T f Mine's came from this divided by the constant and m All right, so now we just plugging the numbers. We know the variation in temperature. Assuming the solution is a cruise, the regular, the normal freezing point of water is zero Celsius and the solution was observed to have minds to six. So the variation was minus 26 So the tu minus signs will cancel each other. So I'm gonna just going to write 2.6 Celsius right here, okay. And then the constant you look, that up is 1.86 Celsius per melo and them allow t is no. Is point for Malala in olden units should cancel. Yep, because this factor has no units and computing the you find 3.5, which indicates an incomplete the association

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