A chemistry graduate student is given 500. mL of a 0.40M ammonia (NH,) solution. Ammonia is a weak base -5 with K=1.8 × 10 . What mass of NH, Cl should the student dissolve in the NH, solution to turn it into a buffer with pH = 8.85? You may assume that the volume of the solution doesn't change when the NH Cl is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter13: Acids And Bases
Section: Chapter Questions
Problem 90QAP: A student prepares 455 mL of a KOH solution, but neglects to write down the mass of KOH added. His...
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A chemistry graduate student is given 500. mL of a 0.40 M ammonia (NH3) solution. Ammonia is a weak base with Kb=1.8x 10^-5 . What mass of NH4C1 should the student dissolve in the NH3 solution to turn it into a buffer with pH = 8.85? You may assume that the volume of the solution doesn't change when the NH, C1 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 500. mL of a 0.40M ammonia (NH,) solution. Ammonia is a weak base
- 5
with K=1.8 × 10 °. What mass of NH, Cl should the student dissolve in the NH, solution to turn it into a
buffer with pH = 8.85?
You may assume that the volume of the solution doesn't change when the NH Cl is dissolved in it. Be sure
your answer has a unit symbol, and round it to 2 significant digits.
の
Transcribed Image Text:A chemistry graduate student is given 500. mL of a 0.40M ammonia (NH,) solution. Ammonia is a weak base - 5 with K=1.8 × 10 °. What mass of NH, Cl should the student dissolve in the NH, solution to turn it into a buffer with pH = 8.85? You may assume that the volume of the solution doesn't change when the NH Cl is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. の
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