Class 10 Chemistry Acids Bases Salts pH scale in our day to day life

pH scale in our day to day life

 

  • Our body works within the pH range of 7.0 to 7.8. The pH of saliva ranges from 6.5-7.5.
  • When pH of rain water is less than 5.6, it is called acid rain that lowers the pH of the river water and makes it difficult for marine creatures to survive.
  • The pH of surface water is 6-8.5 and that of ground water is nearly 6.5-8.5
  • Plants require a specific pH range for their healthy growth.
  • pH of tomato juice ranges from 4.1 to 4.6 whereas the pH of carrot juice is 6.4.
  • Our stomach produces hydrochloric acid during digestion of food causing no harm. But during indigestion an excess amount of acid is produced causing pain and irritation.

  • Bacteria present in the mouth generates acids by decomposing the remaining sugar and food particles in the mouth that lowers the pH to 5.5 and corrodes calcium phosphate present in our teeth enamel.

  • Ant sting injects formic acid and nettle stings and injects methanoic acid causing pain and irritation. Use of a mild base like baking soda on the stung area can provide relief to some extent due to neutralization reaction between acid and base.

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