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Acids, bases and indicators (Indicators (Plant dies can be used as…

- - - - This can be used to preserve foods, such as through pickling
    - - Hydrochloric acid
        
        Stomach juices
      - Lactic acid
        
        Sour milk an yoghurt
      - Ethanoic acid
        
        Vinegar
      - Methanoic acid
        
        Stings from ants and nettles
      - Citric acid
        
        Lemon juice
      - Tannic acid
        
        Tea
      - Ascorbic acid (vitamin C)
        
        Some fruit and veg
  - - - Protection must be worn
        
        Never combine water to an acid, always combine acid to water
        
        Inform the teacher in the event of a spill.
      - Can't corrode glass
    - - Strength is the ease at which hydrogen atoms combine with another substance
      - Concentration is how much water is present in a mixture with an acid