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Acids and Alkalis

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    KS3 revision on acids and alkalis
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  • What colour does a strong acid turn in universal indicator?
    Red
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  • What colour does a strong alkali turn in universal indicator?
    Purple
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  • Why is litmus paper a bad indicator?
    It doesn't tell the strength of the acid or alkali
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  • What pH is neutral?
    7
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  • Is ethanoic acid a weak or strong acid?
    Weak acid (Vinegar)
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  • What colour would you expect lemon juice in universal indicator?
    Orange/yellow
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  • What colour would you expect drain cleaner to be in universal indicator?
    purple
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  • What could be used to neutralise excess stomach acid?
    indigestion tablets
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  • What would help a bee sting?
    Baking soda or onion juice
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  • is a wasp sting acidic or alkaline?
    Akaline
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  • What could a farmer put on his fields to neutralise soil pH?
    Lime (Calcium Carbonate)
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  • What would be an example of a strong acid?
    Hydrochloric/Sulfuric acid
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  • What pH is blood?
    7 - it is neutral
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  • What hazard symbol would you expect to find on a strong alkali?
    Corrosive
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  • What does dilute and concentrated mean?
    Dilute is with water added
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  • How would you describe an alkali to someone?
    Soapy, slippery feel
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