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The concentration of commercially available concentrated nitric acid is 70.0 percent by mass, or 15.9 $M$. Calculate the density and the molality of the solution.

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$37.02 \mathrm{m}$, $37.02 \mathrm{m}$

Chemistry 102

Chapter 12

Physical Properties of Solutions

Solutions

Carleton College

University of Central Florida

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.

01:53

Concentrated nitric acid i…

02:51

02:58

Reagent grade nitric acid …

02:12

Commercial concentrated ni…

01:50

03:40

01:54

Calculate the concentratio…

01:14

What is the molality of ni…

01:39

A sample of concentrated n…

02:44

Concentrated nitric acid u…

So let's consider a simple off the solution. Let's say 100 100 grams just to make it is so we know that this solution has 70% off nitric acid. So in this 100 grams, we have 70 grams off age and 03 in 30 grams of our solvent. We really don't need to know. What's the solvent books? Probably water. Okay, so the first step, let's find it. Density. Um, So Oh, in order to do this, we can compute the number of malls in this 100 grams. Okay, let's do this. So we have 70 grams off the nitric acid to compute the number of moles. We simply used the molar mass, the molar masses 63 Grimm's okay. And computing this, you would get one point 11 Mole. Okay, so in this 100 grams who have 1.11 mole, All right? No, we have another important information. We have the polarity off this solution polarity is the number off malls per volume, right? So the morality, I'm going to write number of moles, Provine, and we know that this is equal 15.9 most for leader. Okay, so we have the number of moles. So to get the volume, we can work this out. The volume will be the number of miles divided by 15.9. Okay, so if you compute this, you would get 0.0 69 8 uh, leaders. Okay, uh, more conveniently you can express this in milliliters. So 69.8 middle letters. All right, So Okay, But we really wanted the dance. That the rain. That's what we want. Um, just remember, density is maths. Providing came. So we have the mass because we chou we up here. We decided to use 100 grams to do this Computations. So it's fine. We know the mass because we decided them as 100 grams and the volume is 69.8. It smells so the density in grams per milliliter will be one point for three great first steps done. Now the morality We also have all the data we need. Morality is number of most divided by the mass. I came. So we have the number of months. 1.1? No, in the mass. Oh, but remember, Porton, it's the mass of the solvent. It's not the total mess Don't 100 grams, you will be the 30 grams which just just this solved king. Usually morality. We wanting most per kilograms. So you have to convert his grams here. So I'm gonna play the comfort factor right here. Okay. So comfort is grams two kilograms and doing this calculation, you should find 37.0 more for killing them.

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