💬 👋 We’re always here. Join our Discord to connect with other students 24/7, any time, night or day.Join Here!

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

Solutions of hydrogen in palladium may be formed by exposing Pd metal to $\mathrm{H}_{2}$ gas. The concentration of hydrogen in the palladium depends on the pressure of $\mathrm{H}_{2}$ gas applied, but in a more complex fashion than can be described by Henry's law. Under certain conditions, 0.94 g of hydrogen gas is dissolved in 215 $\mathrm{g}$ of palladium metal (solution density $=10.8 \mathrm{g} \mathrm{cm}^{3} ) .$(a) Determine the molarity of this solution.(b) Determine the molality of this solution.(c) Determine the percent by mass of hydrogen atoms in this solution.

a. $c_{\mathrm{H}_{2}}=23.51 \frac{\mathrm{mol}}{\mathrm{dm}^{3}}$b. $b_{\mathrm{H}_{2}}=2.19 \frac{\mathrm{mol}}{\mathrm{kg}}$c. $w_{\mathrm{H}_{2}}=0.44 \%$

Chemistry 102

Chapter 11

Solutions and Colloids

Solutions

Shaun R.

December 21, 2020

the answer doesnt line up with the video. I also see the given solution density is 10.8gcm^3 but in the video you explain it as 1.8gcm^3

Carleton College

University of Maryland - University College

Brown University

Lectures

03:07

A liquid is a nearly incom…

04:38

A liquid is a state of mat…

04:07

If palladium metal (densit…

03:51

Concentrated hydrogen pero…

04:31

05:52

Hydrogen is attractive as …

03:15

The density of an aqueous …

11:22

A sulfuric acid solution c…

01:38

What is the molality of ph…

04:18

Calculate the molality of …

05:37

02:22

Hydrogen gas has a Henry&#…

08:26

Binary compounds of alkali…

06:14

(a) Derive the equation re…

03:47

A solution is prepared by …

02:29

06:24

Calculate the molarity and…

02:54

07:29

Determine the molarity for…

06:59

A solution $(d=1.159 \math…

06:36

Brass is a substitutional …

07:27

Metal hydrides react with …

Well, everyone, this is Ricky and today, working on a problem number eight from Chapter 11 and were given that under certain conditions, we can make a solution of hydrogen in palladium. I have but the can. The concentration of hydrogen that in the palladium depends on the pressure of hydrogen gas supplied. All right, so were also given that 0.94 grams of hydrogen is dissolved. Joined your 15 grams of palladium metal. All right, so first, let's calculate polarity. Let's also keep in. Let's also remember that the density of the solution is equal to 1.8 grand's her cubic centimeter. All right, so start off. Let's go with. Let's start by calculating number of moles of hydrogen in the solution. So we have Queen 94 grand stuff option multiplied by one more over the muller mass of hydrogen ISS 1.8 grams. All right, and this is equal to 0.9 three three moles of hydrogen. All right, so yeah, Next, we of we have to determine the volume of the solution. And so for Liam is equal to the total mess over its density, and that is equal to 0.94 grams hydrogen plus 215 grams of palladium. All oh, sure, 1.8 grams per cubic centimeter. And we get that. The volume of our solution is 120. You think centimeters which we need to convert toe leaders. And so we have one meter is equal to 1000 do you think? Centimeters. And so we find that the total volume of our solution is 120 liters of 8.12 leaders. Next we can count calculate the polarity are the concentration of the solution. And so polarity is equal to most of Salyut over volume of solution which is equal to 0.9 33 moles of hydrogen over 0.12 leaders, and that we find that the total mill aridity of the solution is 7.8 more. All right, so next we will be solving for the morality of the solution. All right, let's open another workspace where Malala t is little little m which equals morals. Oh, so you overthe e mass? Oh, solvent. And so what we have are are we already have the moles of hydrogen which is our Salyut, and that is equal to 0.933 So went to 9 33 Moles of hydrogen, divided by moles of are so massive are solvent in kilograms, which is 0.215 kilograms of palladium. And did that little M is equal to bye is equal to 4.34 months for killing I. And lastly, we will be determining the percent by mass of hydrogen atoms in the solution. All right, so the way that we do this is super sensitive enough percent. Why mass of each too solution. All right, So first we look at we look at our massive hydrogen 0.94 grams beach, too overthe e total mass, which is equal to about 216 grams times by 100. And we'll see that the total mass of hydrogen and the solution is only 0.44%. So I hope this video was helpful. See you on the next one.

View More Answers From This Book

Find Another Textbook

Numerade Educator

A liquid is a nearly incompressible fluid that conforms to the shape of its …

A liquid is a state of matter in which a substance changes its shape easily …

If palladium metal (density 12.0 $\mathrm{g} / \mathrm{cm}^{3} )$ dissolves …

Concentrated hydrogen peroxide solutions are explosively decomposed by trace…

Hydrogen is attractive as a fuel because it has a high fuel value and produc…

The density of an aqueous solution containing 10.0 percent of ethanol $\left…

A sulfuric acid solution containing 571.6 $\mathrm{g}$ of $\mathrm{H}_{2} \m…

What is the molality of phosphoric acid, $\mathrm{H}_{3} \mathrm{PO}_{4},$ i…

Calculate the molality of each of the following solutions:(a) 583 g of $…

The density of an aqueous solution containing 15.0 percent of ethanol $\left…

Hydrogen gas has a Henry's law constant of $7.8 \times$ $10^{-4} \mathr…

Binary compounds of alkali metals and hydrogen react with water to liberate …

(a) Derive the equation relating the molality $(m)$ of a solution to its mol…

A solution is prepared by dissolving 20.2 mL of methanol(CH3OH) in 100.0…

Hydrogen gas has a Henry's law constant of $1.07 \times 10^{-6}$ $\math…

Calculate the molarity and mole fraction of acetone in a 1.00 -m solution of…

Calculate the molarity and mole fraction of acetone in a $1.00-m$ solution o…

Determine the molarity for each of the following solutions:(a) 0.444 $\m…

A solution $(d=1.159 \mathrm{g} / \mathrm{mL})$ is $62.0 \%$ glycerol, $\mat…

Brass is a substitutional alloy consisting of a solution of copper and zinc.…

Metal hydrides react with water to form hydrogen gas and the metal hydroxide…

05:47

In the early days of automobiles, illumination at night was provided by burn…

04:43

For each of the following structures, determine the hybridization requested …

01:53

Many chemistry conferences have held a 50 -Trillion Angstrom Run (two signif…

02:38

Determine which of the following contains the greatest mass of aluminum: 122…

01:48

How do solutions differ from compounds? From other mixtures?

06:21

Calculate the number of moles and the mass of the solute in each of the foll…

00:43

What additional information do we need to answer the question “Which ion has…

02:25

From the molar heats of formation in Appendix $\mathrm{G}$ , determine how m…

05:06

The white pigment TiO $_{2}$ is prepared by the reaction of titanium tetrach…

00:55

Is a 197-lb weight lifter light enough to compete in a class limited to thos…