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# (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 change as it turns to curd? Explain your answer.

Last updated date: 15th Mar 2023
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Hint :Our body works between the $pH$ ranges $7.3 - 7.5$ . Acidity is the excess of acid level in the stomach. Antacid contains basic salt, so whenever we take antacid it reacts with the excess acid of the stomach and neutralizes it. The neutralization reaction takes place between the acid and the base. Commonly used antacids have at least one of these ingredients: Calcium Carbonate, Magnesium Hydroxide, Aluminium Hydroxide or Sodium Bicarbonate.
The $pH$ of the stomach is $2$ . Antacids are the chemicals which act like bases and neutralize the acids present in the stomach. Sodium hydrogen carbonate is a good example of an antacid. $pH$ of milk decreases when it is converted into curd. This is due to an increase in the acidity of the milk due to the lactic acid producing bacteria.