Successively heating a sample yielded the following data. When the student  disposed of the sample they noticed several black spots on the bottom of the  dehydrated sample. Briefly explain what’s happening during each heating and  with which heating the student should have stopped.

Introductory Chemistry: A Foundation
8th Edition
ISBN:9781285199030
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter8: Chemical Composition
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Successively heating a sample yielded the following data. When the student  disposed of the sample they noticed several black spots on the bottom of the  dehydrated sample. Briefly explain what’s happening during each heating and  with which heating the student should have stopped. 

Mass before heating: 1.50 g 

Mass after 1st heating: 1.20 g 

Mass after 2nd heating: 1.12 g 

Mass after 3rd heating: 1.05 g 

Mass after 4th heating: 1.03 g 

Mass after 5th heating: 1.11 g 

Mass after 6th heating: 1.14 g 

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