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Acid or alkali? Acidic or alkaline?

Description

This simple experiment involves testing a variety of substances to see if they are acidic or alkaline, using litmus paper as the indicator.

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
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Apparatus Chemicals

Eye protection

Watch glasses, 1 per sample (Note 1)

White tiles, 1 per sample (Note 1)

Red and blue litmus paper, 3 pieces of each per working group

Access to small amounts of common everyday substances such as (Note 2)

fizzy drinks

tap water

de-ionised/distilled water

toothpaste

shampoo

soap

vinegar

lemon juice

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

 






This simple experiment involves testing a variety of substances to see if they are acidic or alkaline, using litmus paper as the indicator.

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.