Importance of pH in Daily Life


 
 
Concept Explanation
 

Importance of pH in Daily Life

The pH values of some common solutions

How is pH measured?

The pH of a solution is generally determined with the help of a pH paper, or universal indicator. The pH paper gives a particular colour with a solution of particular pH. The colour is compared with a chart which has different colours at different pH values.

Role of pH in everyday life:

1. In our digestive system: Hydrochloric acid produced in our stomach helps the digestion of food without causing any harm to the stomach. But when the amount of the acid goes beyond a certain limit due to indigestion, pain and irritation are created in the stomach. So, in order to neutralize the effect of excess acid, a mild base called antacid is usually taken. Magnesium hydroxide (milk of magnesia) is a mild base which is usually used as an antacid.

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Sample Questions
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Question : 1

The pH of a sample 'X' is found to be 10. The sample 'X' may be of the substance.

Right Option : C
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Question : 2

Tooth decay starts when the pH of the mouth is lower than ________________

Right Option : D
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Question : 3

In which of the following pH ranges does our body work?

Right Option : C
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