Physical properties of acids

Physical properties of acids

  • Acids are electrolytes. They contain mobile ions that can conduct electricity.
  • Acids have a sour taste.
  • Acids turn blue litmus paper.
  • Acids turn Universal indicator red (pH 1-2), orange (pH 3-4) and yellow(pH 5-6).
  • Acids turn methyl orange red and phenolphthalein colourless.

Where can acids be found?

ethanoic acid Vinegar
citric acid Lemon and lime juices
tartaric acid Grapes
lactic acid Milk
tannic acid Tea leaves
carbonic acid Rain water, fizzy drinks
formic acid Ants
sulfuric acid Car batteries, fertilizers
hydrochloric acid Produced by our stomach to digest food, clean metals before coating
nitric acid Fertilizers and explosives
phosphoric acid Fertilizers, preventing rusting of iron

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