Thursday, October 22, 2020

Types of Reactions—Decomposition

 General Chemistry Index

Where are we going with this? This page will assist in developing the ability to describe, classify, and give examples of various kinds of reactions: synthesis (i.e., combination), decomposition, single displacement, double displacement, acid/base, and combustion.

Activity: Types of Reactions—Decomposition
(Thermal Decomposition of Sodium Bicarbonate)

Background Information: Types of Reactions

The purpose of this activity is to provide hands-on experience using laboratory techniques to observe a decomposition reaction

Evidence of the reaction is easily seen in the production of gas.

Primary Reaction: 2 NaHCO3 → Na2CO3 + H2O + CO2

Possible Secondary Reaction: Na2CO3 → Na2O + CO2

The decomposition of anhydrous sodium carbonate into sodium oxide and carbon dioxide occurs slowly at room temperature and proceeds to completion at 851 C. 

Link to activity worksheet:  CLICK HERE

The video below demonstrates how to set up the lab and collect the data. Actual data collected from the video may be used to do the lab virtually.

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