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Equilibria involving carbon dioxide in aqueous solution

Description

Methyl red indicator added to soda water in a syringe turns from red to yellow, showing the solution has become less acidic as the equilibria adjusts.

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
equilibria-involving-carb...



Apparatus Chemicals

Eye protection

For one demonstration or each pair of students:

Plastic syringe (50 cm3), (modified as in Note 1)

Syringe cap (optional)

Nail (5 cm)

Beaker (100 cm3)

Soda water or carbonated mineral water, a few cm3

Methyl red indicator solution, a few drops

Refer to Health & Safety and Technical notes section below for additional information.

 


 


 





Methyl red indicator added to soda water in a syringe turns from red to yellow, showing the solution has become less acidic as the equilibria adjusts.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology.