Question

A) mention the ph range within which our body works. explain how antacids give relief from acidity. write the name of one such antacid.
(b) fresh milk has a ph of 6. how does the ph will change as it turns to curd ? explain your answer.
(c) a milkman add a very small amount of baking soda to fresh milk. why does this milk take a longer time to set as curd ?
(d) mention the nature of tooth pastes. how do they prevent tooth decay ?

Answer 1

Ans A

The pH of our roughly work around

7.3 to 7.8. When excess of hydrochloric acid is released by our stomach then we use antacid which reduces the effect of of acid as antacid are basic in nature. example for antacids milk of magnesia and baking soda.

Ans B

since it has in curd the pH will decrease has got are acidic in nature.

Ans C

the milkman has changed the pH of the milk into basic as he had added baking soda which is basic in nature therefore it will take time to convert in acid.

Ans D

our mouth has a pH of 5.5 and when it decreases through the particle of food present in the mouth, it become acidic.therefore we use toothpaste which is basic in nature which neutralizes the reaction.