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Acids and Alkalis

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  • What could a farmer put on his fields to neutralise soil pH?
    Lime (Calcium Carbonate)
  • What does dilute and concentrated mean?
    Dilute is with water added
  • What would help a bee sting?
    Baking soda or onion juice
  • What colour does a strong acid turn in universal indicator?
    Red
  • what colour does red litmus turn with alkali?
    Blue
  • How would you describe an acid to someone?
    Sour taste
  • Is ethanoic acid a weak or strong acid?
    Weak acid (Vinegar)
  • How would you describe an alkali to someone?
    Soapy, slippery feel
  • What gas causes acid rain?
    Sulfur dioxide
  • What colour would you expect drain cleaner to be in universal indicator?
    purple
  • What hazard symbol would you expect to find on a strong alkali?
    Corrosive
  • How is sulfur dioxide released into the atmosphere?
    Burning of fossil fuels
  • Why is litmus paper a bad indicator?
    It doesn't tell the strength of the acid or alkali
  • What is present in your mouth that causes tooth decay?
    Bacteria
  • is a wasp sting acidic or alkaline?
    Akaline
  • What would be an example of a strong acid?
    Hydrochloric/Sulfuric acid
  • What pH is blood?
    7 - it is neutral
  • What colour would you expect lemon juice in universal indicator?
    Orange/yellow
  • What could be used to neutralise excess stomach acid?
    indigestion tablets
  • What colour does a strong alkali turn in universal indicator?
    Purple
  • What pH is neutral?
    7
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