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How do antacid tablets work?

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by

Varsha Ramesh

on 21 October 2016

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Transcript of How do antacid tablets work?

How do antacid tablets work?
What happens to the pH of the stomach after taking an antacid??
Antacids neutralise some of the stomach acid after taking an antacid tablet therefore raising the pH. Raising the pH lowers the acidity and brings it to weak acid. If it brings it to neutral, the stomach can no longer digest food.
We all have acid in our bodies. Well, corrosive acid. It is the acid that helps digest the food we eat. To protect the stomach from being corroded our body produces a natural mucous barrier which protects the lining of the stomach. Sometimes, the acid from the stomach leaks up into the gullet (Acid Reflux) . And in these cases we take an antacid tablet.


The name of the acid in our stomach is Gastric/Hydrochloric Acid and has a pH of about 1.5 to 3.5
What is an Antacid tablet and why do people take it?
The making of a salt - Neutralisation.
Antacids work by neutralising the acid in your stomach.They do this because they contain Alkali particles (Calcium Hydroxide) which are the opposite of acids.

The acid and the alkali particles are moving. When they collide a reaction takes place called Neutralisation. The more alkali particles there are the more of the acid is neutralised. This neutralisation makes the stomach less corrosive.
The acid particles are in our stomach. The alkali particles are in an antacid tablet. When we swallow the tablet the alkali particles are free to move as the outer covering of the tablet dissolves.
When all the particles are moving, this takes place. (The image-Next slide)
When an acid and an alkali neutralise they produce a salt.
Word equation -
Hydrochlori Acid + Calcium Hydroxide= Sodium Chloride

Symbol Equation -
HCL+CaOH= NaCL
More about particles or...
Molecules!
By - Varsha
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