Solution Found!

Chemistry / Chemistry 11 / Chapter 12 / Problem 97P

Chemistry | 11th Edition | ISBN: 9780073402680 | Authors: Raymond Chang

Change Question

?A protein has been isolated as a salt with the formula \(N a_{20} P\) (this notation

Chapter 12, Problem 97P

(choose chapter or problem)

Get Unlimited Answers

QUESTION:

A protein has been isolated as a salt with the formula \(N a_{20} P\) (this notation means that there are 20 \(\mathrm{Na}^{+}\) ions associated with a negatively charged protein \(P^{20-}\)). The osmotic pressure of a 10.0-ml solution containing 0.225 g of the protein is 0.257 atm at 25.0°C. (a) Calculate the molar mass of the protein from these data. (b) Calculate the actual molar mass of the protein.

Questions & Answers

QUESTION:

A protein has been isolated as a salt with the formula \(N a_{20} P\) (this notation means that there are 20 \(\mathrm{Na}^{+}\) ions associated with a negatively charged protein \(P^{20-}\)). The osmotic pressure of a 10.0-ml solution containing 0.225 g of the protein is 0.257 atm at 25.0°C. (a) Calculate the molar mass of the protein from these data. (b) Calculate the actual molar mass of the protein.

ANSWER:

Step 1 of 7

Osmotic pressure is the pressure required to prevent the flow of solvent from a region of high concentration to a region of low concentration across a semipermeable membrane. It is determined by the concentration of solute particles in a solution and is proportional to the concentration of solute particles.

where is the molarity of solution, is the gas constant , and is the absolute temperature. The osmotic pressure, , is expressed in atm. Because osmotic pressure measurements are carried out at constant temperature, we express the concentration in terms of the more convenient units of molarity rather than molality.

Study Tools You Might Need

Chapter: 2 Problem: 1E

Statistics for Engineers and Scientists 4
In a certain community, levels of air pollution may exceed federal standards for ozone or for particulate matter on some days. For a particular summer season, let X be the number of days on which the ozone standard is exceeded and let Y be the number of days on which the particulate matter standard i

Chapter: 22 Problem: 22.5

Physics for Scientists & Engineers with Modern Physics 4
The total electric flux from a cubical box 28.0 cm on a side is 1.84 X 103N m2/C. What charge is enclosed by the box?

Chapter: 30 Problem: 30.100

Physics for Scientists and Engineers: A Strategic Approach, Standard Edition (Chs 1-36) 4
Your camping buddy has an idea for a light to go inside your tent. He happens to have a powerful (and heavy!) horseshoe magnet that he bought at a surplus store. This magnet creates a 0.20 T field between two pole tips 10 cm apart. His idea is to build the hand-cranked generator shown in FIGURE P30.5

Chapter: 23 Problem: 23-5

Glencoe Accounting: First Year Course, Student Edition 1
Preparing a Depreciation Schedule and Journalizing the Depreciation Adjusting Entry Quade Corporation bought a copy machine on January 7 of the current year for $2,360. It has an estimated useful life of five years and an estimated disposal value of $100. Instructions In your working papers: 1.

Chapter: 6 Problem: 3

Psychology 1
Two forms of associative learning are ________ and ________. a. classical conditioning; operant conditioning b. classical conditioning; Pavlovian conditioning c. operant conditioning; observational learning d. operant conditioning; learning conditioning

Chapter: 1 Problem: 14

Biology 2e by Openstax
Which of the following sequences represents the hierarchy of biological organization from the most inclusive to the least complex level? a. organelle, tissue, biosphere, ecosystem, population b. organ, organism, tissue, organelle, molecule c. organism, community, biosphere, molecule, tissue, organ d.

Chapter: 14 Problem: 3

Urban Economics 8
Changes in Quality Level Using the two-panel graph in Figure 142 as a model, show the effects of two changes in the housing market. a. An increase in price [increases, decreases] the slope of the _____ curve and shifts the _____curve [upward, downward]. The profi t-maximizing quality [increases, decr

Chapter: 19 Problem: 1

Biology: The Dynamic Science 5
What additional biological questions can be answered if one has the complete sequence of an organism's genome as compared with the sequences of individual genes?

Not The Solution You Need? Search for Your Answer Here:

×

Login

Login or Sign up for access to all of our study tools and educational content!

×

Register

Sign up for access to all content on our site!

Or login if you already have an account