Q34 of 270 Page 79

How does an antacid work?

Antacid is basic in nature. It will neutralize the excess acid produced in stomach and relieve the pain.

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34 What do you think will be the pH in the stomach of a person suffering from indigestion : less than 7 or more than 7? 34 What do you think will be the pH of an antacid solution: less than 7 or more than 7? 34 Name two common antacids. 35 Separate the following into substances having pH values above and below 7. How do these influence litmus paper?

(i) Lemon juice


(ii) Solution of washing soda


(iii) Toothpaste


(iv) Vinegar


(v) Stomach juices