Solutions with a pH below 7 are considered acidic, while those above 7 are basic or alkaline. The pH scale measures the acidity or alkalinity of a solution and ranges from 0 to 14. pH is important in many fields including medicine, biology, chemistry, agriculture, forestry, food science, and engineering. It plays a key role in processes like tooth decay prevention through basic toothpastes, plant and animal sensitivity, soil chemistry, digestive systems, and chemical defenses in nature.

1. Chemistry

2. pH in daily
life
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3. pH

4. pH
• Solutions with a pH less than 7 are said
to be acidic and solutions with a pH
greater than 7 are basic or alkaline .
• pH measurements are important in
medicine, biology, chemistry,
agriculture, forestry, food science,
environmental science, oceanography,
civil engineering, chemical engineering,
and many other applications.

5. HISTORY OF pH

6. pH SCALE

7. pH SCALE
IncreasingacidityIncreasingalkelinity
Neutral

8. pH SCALE
IncreasingacidityIncreasingalkelinity
Neutral

9. Video Clip
pH SCALE Different
things that lie on 1-14
on p[H]scale.
pH SCALE

11. pH in our teeth

12. Using toothpastes, which
are generally basic, for
cleaning the teeth
neutralizes the excess acid
and prevent tooth decay.
pH in our teeth

13. pH Sensitivity in plants and
animals

14. pH Sensitivity in plants and
animals

15. pH in Soil

16. pH in our digestive system

17. Defence by animals and plants
through chemical warfare

18. Nature provides
neutralisation options…