A chemistry graduate student is given 450. mL of a 1.20M ammonia (NH,) solution. Ammonia is a weak base with K, = 1.8 x 10. What mass of NH¸Br should the student dissolve in the NH, solution to turn it into a buffer with pH =9.56? You may assume that the volume of the solution doesn't change when the NH, Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
A chemistry graduate student is given 450. mL of a 1.20M ammonia (NH,) solution. Ammonia is a weak base with K, = 1.8 x 10. What mass of NH¸Br should the student dissolve in the NH, solution to turn it into a buffer with pH =9.56? You may assume that the volume of the solution doesn't change when the NH, Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
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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![O ACIDS AND BASES
Calculating the composition of a buffer of a given pH
4/5
A chemistry graduate student is given 450. mL of a 1.20M ammonia (NH,) solution. Ammonia is a weak base with K, = 1.8 × 10 . What mass of NH,Br
should the student dissolve in the NH, solution to turn it into a buffer with pH =9.56?
You may assume that the volume of the solution doesn't change when the NH,Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2
significant digits.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbe13ccd1-406f-41f2-a68f-528af19a0bb2%2F6bb62c3a-f115-4e9f-a2a5-d8ca9fea9f68%2F20eou35_processed.jpeg&w=3840&q=75)
Transcribed Image Text:O ACIDS AND BASES
Calculating the composition of a buffer of a given pH
4/5
A chemistry graduate student is given 450. mL of a 1.20M ammonia (NH,) solution. Ammonia is a weak base with K, = 1.8 × 10 . What mass of NH,Br
should the student dissolve in the NH, solution to turn it into a buffer with pH =9.56?
You may assume that the volume of the solution doesn't change when the NH,Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2
significant digits.
![O KINETICS AND EQUILIBRIUM
Calculating equilibrium composition from an equilibrium constant
OOD 3/5
Suppose a 500. mL flask is filled with 1.5 mol of O, and 0.60 mol of NO. The following reaction becomes possible:
N,(2) -0,(2) – 2NO(2)
The equilibrium constant K for this reaction is 5.01 at the temperature of the flask.
Calculate the equilibrium molarity of O,. Round your answer to two decimal places.
M](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbe13ccd1-406f-41f2-a68f-528af19a0bb2%2F6bb62c3a-f115-4e9f-a2a5-d8ca9fea9f68%2Fhh4mmi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:O KINETICS AND EQUILIBRIUM
Calculating equilibrium composition from an equilibrium constant
OOD 3/5
Suppose a 500. mL flask is filled with 1.5 mol of O, and 0.60 mol of NO. The following reaction becomes possible:
N,(2) -0,(2) – 2NO(2)
The equilibrium constant K for this reaction is 5.01 at the temperature of the flask.
Calculate the equilibrium molarity of O,. Round your answer to two decimal places.
M
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