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Short · Solutions, Water, Acids & Bases

Universal indicator bubbles - Acid Breath

0:57Practical demonstrationIntroductory

This Short shows exhaled carbon dioxide dissolving in water and shifting universal indicator towards acidic colours.

Indicators, neutralisation & titrationsDemonstrations & data interpretationShort videoAcid-base indicatorNeutralisationTitrationEquivalence pointDemonstration

Learning goals

What you should be able to do

  • explain why exhaled carbon dioxide lowers the pH of water
  • interpret a universal-indicator colour change

Curriculum links

VCE Chemistry connections

  • Unit 2, Area of Study 1Acid-base (proton transfer) reactions

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