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Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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22:48 Tue May 4
Done <
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A session.masteringchemistry.com
<Chemistry Primer - Semester 2 - Retake at the End of Semester
Concentration in Mole Fraction and Molality
4 of 25
I Review I Constants I Periodic Table
Learning Goal:
Concentration is expressed in various ways in
second semester general chemistry. In this tutorial,
you will learn how to calculate concentration using
mole fraction and molality.
Part A - Using the definition for mole fraction.
A solution was prepared by dissolving 195.0 g of KCl in 225 g of water.
In your first chemistry course you learned about
expressing the concentration of solutes in solution
using molarity, the number of moles of a solute
per liter of solution. In this tutorial, we will review
Calculate the mole fraction of KCl. (The formula weight of KCl is 74.6 g/mol. The formula weight of water
is 18.0 g/mol.)
Express the mole fraction of KCl to two decimal places.
two other ways of expressing concentration, called
molality and mole fraction.
• View Available Hint(s)
The concentration of a solution can be expressed in
several different ways. Three common
concentration expressions are shown below:
Vο ΑΣφ
?
molarity (M) = moles of solute
liters of solution
X =
mole fraction (x) =
moles of component
total moles
moles of solute
molality (m) =
Submit
kg mass of solvent
Part B - Use the definition of molality
A solution was prepared by dissolving 195.0 g of KCl in 225 g of water.
Calculate the molality of KCl. (The formula weight of KCl is 74.6 g/mol. The formula weight of water is
18.0 g/mol.)
Express the concentration of KCl in molality to two decimal places.
• View Available Hint(s)
O 0.09 mol/kg
Transcribed Image Text:22:48 Tue May 4 Done < AA A session.masteringchemistry.com <Chemistry Primer - Semester 2 - Retake at the End of Semester Concentration in Mole Fraction and Molality 4 of 25 I Review I Constants I Periodic Table Learning Goal: Concentration is expressed in various ways in second semester general chemistry. In this tutorial, you will learn how to calculate concentration using mole fraction and molality. Part A - Using the definition for mole fraction. A solution was prepared by dissolving 195.0 g of KCl in 225 g of water. In your first chemistry course you learned about expressing the concentration of solutes in solution using molarity, the number of moles of a solute per liter of solution. In this tutorial, we will review Calculate the mole fraction of KCl. (The formula weight of KCl is 74.6 g/mol. The formula weight of water is 18.0 g/mol.) Express the mole fraction of KCl to two decimal places. two other ways of expressing concentration, called molality and mole fraction. • View Available Hint(s) The concentration of a solution can be expressed in several different ways. Three common concentration expressions are shown below: Vο ΑΣφ ? molarity (M) = moles of solute liters of solution X = mole fraction (x) = moles of component total moles moles of solute molality (m) = Submit kg mass of solvent Part B - Use the definition of molality A solution was prepared by dissolving 195.0 g of KCl in 225 g of water. Calculate the molality of KCl. (The formula weight of KCl is 74.6 g/mol. The formula weight of water is 18.0 g/mol.) Express the concentration of KCl in molality to two decimal places. • View Available Hint(s) O 0.09 mol/kg
22:48 Tue May 4
Done <
AA
A session.masteringchemistry.com
<Chemistry Primer - Semester 2 - Retake at the End of Semester
Concentration in Mole Fraction and Molality
4 of 25
I Review I Constants I Periodic Table
Learning Goal:
να ΑΣΦ
?
Concentration is expressed in various ways in
second semester general chemistry. In this tutorial,
you will learn how to calculate concentration using
mole fraction and molality.
X =
In your first chemistry course you learned about
expressing the concentration of solutes in solution
using molarity, the number of moles of a solute
per liter of solution. In this tutorial, we will review
Submit
two other ways of expressing concentration, called
molality and mole fraction.
Part B - Use the definition of molality
The concentration of a solution can be expressed in
several different ways. Three common
A solution was prepared by dissolving 195.0 g of KCl in 225 g of water.
concentration expressions are shown below:
Calculate the molality of KCl. (The formula weight of KCl is 74.6 g/mol. The formula weight of water is
18.0 g/mol.)
molarity (M) = moles of solute
liters of solution
Express the concentration of KCl in molality to two decimal places.
mole fraction (x) =
moles of component
total moles
• View Available Hint(s)
moles of solute
molality (m) =
kg mass of solvent
O 0.09 mol/kg
O 0.17 mol/kg
O 11.6 mol/kg
O 0.01 mol/kg
Submit
Provide Feedback
Next >
圓
Transcribed Image Text:22:48 Tue May 4 Done < AA A session.masteringchemistry.com <Chemistry Primer - Semester 2 - Retake at the End of Semester Concentration in Mole Fraction and Molality 4 of 25 I Review I Constants I Periodic Table Learning Goal: να ΑΣΦ ? Concentration is expressed in various ways in second semester general chemistry. In this tutorial, you will learn how to calculate concentration using mole fraction and molality. X = In your first chemistry course you learned about expressing the concentration of solutes in solution using molarity, the number of moles of a solute per liter of solution. In this tutorial, we will review Submit two other ways of expressing concentration, called molality and mole fraction. Part B - Use the definition of molality The concentration of a solution can be expressed in several different ways. Three common A solution was prepared by dissolving 195.0 g of KCl in 225 g of water. concentration expressions are shown below: Calculate the molality of KCl. (The formula weight of KCl is 74.6 g/mol. The formula weight of water is 18.0 g/mol.) molarity (M) = moles of solute liters of solution Express the concentration of KCl in molality to two decimal places. mole fraction (x) = moles of component total moles • View Available Hint(s) moles of solute molality (m) = kg mass of solvent O 0.09 mol/kg O 0.17 mol/kg O 11.6 mol/kg O 0.01 mol/kg Submit Provide Feedback Next > 圓
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