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Acids and Alkalis Study Guide: pH Measurement and Universal Indicator

Prepare for your digestion test tomorrow by studying about the strength of acids and alkalis, the pH scale, and the use of Universal Indicator. Learn to measure pH with various indicators and explore color reactions in this engaging lesson. Join the mission to create a rainbow of colors with acids and alkalis using Universal Indicator and earn house marks. Remember safety first and use small amounts! Get ready for the last lesson on acids and alkalis measurement.

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Acids and Alkalis Study Guide: pH Measurement and Universal Indicator

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Presentation Transcript

  1. Don’t forget you have a digestion test tommorow. Do some study whilst you are waiting. Do now!

  2. Last lesson • Measuring the strength of acids and alkalis • The pH scale • Using “Universal Indicator”

  3. The pH scale strong acid pH stands for the “potential of hydrogen” weak acid weak alkali Strong alkali

  4. Universal Indicator

  5. Universal Indicator To measure pH, we need an indicator that has a different colour for each value of pH Universal Indicator

  6. Universal Indicator It comes in the form of a paper

  7. Universal Indicator It also comes in the form of a liquid

  8. Measuring pH You are now going to measure the pH of various acids, alkalis and household liquids.

  9. Measuring pH

  10. Today’s lesson • What happens when we mix acids and alkalis • A string acid!

  11. Mission impossible?

  12. Mission impossible? Your task is to produce the colours of the rainbow in 6 test tubes using only Universal Indicator liquid and the acids and alkalis provided.

  13. Mission impossible?

  14. Mission impossible? The first group to succeed will receive 3 house marks each

  15. Mission impossible? Don’t forget safety glasses! Use SMALL amounts – it’s easier!

  16. A strong acid!

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