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Acids and Alkalis

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    Grade 8 revision on acids and alkalis
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  • What colour does a strong acid turn in universal indicator?
    Red
  •  15
  • What colour does a strong alkali turn in universal indicator?
    Purple
  •  15
  • What pH is neutral?
    7
  •  10
  • Is Sodium Hydroxide a strong acid or strong alkali?
    Strong alkali
  •  15
  • What colour would you expect lemon juice in universal indicator?
    Orange/yellow
  •  15
  • What colour would you expect drain cleaner to be in universal indicator?
    purple
  •  15
  • What could be used to neutralise excess stomach acid or indigestion?
    antacids
  •  15
  • What would help neutralised a bee sting?
    Baking soda
  •  15
  • Is a wasp sting acidic or alkaline?
    Akaline
  •  15
  • What could a farmer put on his fields to neutralise soil pH?
    Lime (Calcium Carbonate)
  •  15
  • What would be an example of a strong acid?
    Hydrochloric/Sulfuric acid
  •  15
  • What pH is blood?
    7.0+ - it is neutral 
  •  15
  • What hazard symbol would you expect to find on a strong alkali?
    Corrosive
  •  15
  • What does dilute mean?
    adding water to weaken the substance
  •  15
  • How would you describe an alkali to someone?
    Soapy, slippery feel
  •  15
  • How would you describe an acid to someone?
    Sour taste
  •  15