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A Colorful Decomposition of a Carbonate - Chemical Demonstration Kit

A Colorful Decomposition of a Carbonate -
Chemical Demonstration Kit, AP6602
Catalog Number
A Colorful Decomposition of a Carbonate - Chemical Demonstration Kit
Product Description

By: Borislaw Bilash II
Pascack Valley High School, Hillsdale, NJ

Challenge students to deduce the chemical reaction that leads to dramatic color changes when a sample of copper carbonate is heated. Copper carbonate is added to a flask and a wine airlock containing bromthymol blue solution is placed on top of the flask. The flask is then heated on a hot plate, decomposing the green copper carbonate to black copper oxide and carbon dioxide gas. The gas bubbles through the bromthymol blue indicator solution, lowering the pH and causing a color change from blue to yellow. Through a series of guided questions, students determine what reaction is occurring and what products form. Includes Teacher Demonstration Notes, a reproducible student worksheet, and answer sheet. Enough materials are included to perform the demonstration seven times.
Concepts: Decomposition, gas solubility, indicators.
Time Required: 15 minutes
Materials Provided: Copper(II) carbonate, bromthymol blue indicator solution, wine airlock, 1-hole rubber stopper.


Additional Resources
No Additional Resources at the time.
Flinn Catalog/Reference Manual Page 374
P.O. Box 219, Batavia, IL60510



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