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  • Acid: any substance that donates H+ ions; A solution that contains more H+ than OH- ions
  • Base: any substance that removes free H+ from a solution¬†
  • Alkali: any substance that donates OH- ions into a solution; A solution that contains more OH- than H+ ions
  • pH: the concentration of hydrogen ions (H+) in a solution
  • Acidic: a solution containing excess H+ ions; a solution with a pH less than 7
  • Alkaline: a solution containing fewer H+ than OH- ions; a solution with a pH greater than 7
  • Neutral: a solution where there are exactly the same number of H+ and OH- ions


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Acids, Alkalis and Bases: An introduction - Print summary

This RLO introduces you to acids, alkalis and bases.

Learning outcomes

By completing this resource you will learn about:

  • acids, alkalis and bases
  • direct and indirect measurement

Learning outcomes

By completing this resource you will learn about:

  • acids, alkalis and bases
  • direct and indirect measurement

This resource was developed by:

Jennifer Dandrea - content author

Paul Robertson, Liz Hilton - developers

The resource was originally funded by Cetl.

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