Chemistry Unit 2 - Acids, Bases and Salts

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 Indicator is used to determine wether a substance is an acid or an alkali.

  • Red - Yellow = Acid
  • Green = Neutral
  • Blue - Purple = Alkali
  • An Acid is a substance with a pH of less than 7.
  • Acids form H+ ions in water
  • A base is a substance with a pH of greater than 7.
  • An alkali is a base that dissolves in water.
  • Alkali's form OH- ions in water.

H+ ions make water acidic and OH- ions make them alkaline.

The reaction between acids and bases is

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