A 0.8965g ore sample is dissolved in nitric acid and then filtered. The aluminum is present in solution as AP. The solution is made basic with ammonium hydroxide, NH.OH, and the aluminum hydroxide, Al(OH): (FW 78.004), precipitates. This gel is filtered in a porous glass crucible, rinsed with dilute ammonium hydroxide, ignited, cooled in a desiccator, and weighed. The resulting alumina, Al:O; (FW 101.94), weighed 0.1605 g. Why is the solution filtered after acid dissolution? Why rinse with ammonium hydroxide sohution? What chemical transformation takes place during ignition? (Show the balanced chemical equation) Why use a desiccator during cooling? Calculate the weight percent Al (AW 26.9815) in the sample. Al(OH), -> Al:O, + H;o
A 0.8965g ore sample is dissolved in nitric acid and then filtered. The aluminum is present in solution as AP. The solution is made basic with ammonium hydroxide, NH.OH, and the aluminum hydroxide, Al(OH): (FW 78.004), precipitates. This gel is filtered in a porous glass crucible, rinsed with dilute ammonium hydroxide, ignited, cooled in a desiccator, and weighed. The resulting alumina, Al:O; (FW 101.94), weighed 0.1605 g. Why is the solution filtered after acid dissolution? Why rinse with ammonium hydroxide sohution? What chemical transformation takes place during ignition? (Show the balanced chemical equation) Why use a desiccator during cooling? Calculate the weight percent Al (AW 26.9815) in the sample. Al(OH), -> Al:O, + H;o
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter21: Chemistry Of The Main-group Elements
Section: Chapter Questions
Problem 21.200QP
Related questions
Question
![A 0.8965g ore sample is dissolved in nitric acid and then filtered. The aluminum is present in solution
as AP". The solution is made basic with ammonium hydroxide, NH,OH, and the aluminum hydroxide,
Al(OH)» (FW 78.004), precipitates. This gel is filtered in a porous glass crucible, rinsed with dilute
ammonium hydroxide, ignited, cooled in a desiccator, and weighed. The resulting alumina, Al;O; (FW
101.94), weighed 0.1605 g.
Why is the solution filtered after acid dissolution?
Why rinse with ammonium hydroxide solution?
What chemical transformation takes place during ignition? (Show the balanced chemical
equation)
• Why use a desiccator during cooling?
Calculate the weight percent Al (AW 26.9815) in the sample.
Al(OH)) -> Al;O, + H0](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F84722488-4b63-49ef-8daa-9ff023bb213b%2Fd8cbb27e-317f-486b-b22f-d87e84f6f856%2F5omkrsi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A 0.8965g ore sample is dissolved in nitric acid and then filtered. The aluminum is present in solution
as AP". The solution is made basic with ammonium hydroxide, NH,OH, and the aluminum hydroxide,
Al(OH)» (FW 78.004), precipitates. This gel is filtered in a porous glass crucible, rinsed with dilute
ammonium hydroxide, ignited, cooled in a desiccator, and weighed. The resulting alumina, Al;O; (FW
101.94), weighed 0.1605 g.
Why is the solution filtered after acid dissolution?
Why rinse with ammonium hydroxide solution?
What chemical transformation takes place during ignition? (Show the balanced chemical
equation)
• Why use a desiccator during cooling?
Calculate the weight percent Al (AW 26.9815) in the sample.
Al(OH)) -> Al;O, + H0
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