How can too much acid in the stomach be reduced

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How can too much acid in the stomach be reduced?

What you need:

• dilute hydrochloric acid

• universal indicator • baking powder solution

What to do:

1. Using a measuring cylinder, measure 5 cm3 of dilute hydrochloric acid and pour it into a test tube.

2. Add 2 drops of the universal indicator.

3. Add baking powder solution, a little at a time, until the colour turns green.

Discussion Question

In groups, discuss the effect of baking powder solution on dilute hydrochloric acid solution. Conclusion Dilute hydrochloric acid in our stomach provides a medium for the digestion of food. However, when the stomach secretes excess acid, it causes indigestion. The acid burns the lining of the stomach, thereby causing peptic ulcers. Alkaline substances neutralise the excess acidity in the stomach. Some substances that are used to neutralise acidity in daily life are shown below.

Health benefit!

Milk, sodium bicarbonate and magnesium hydroxide are anti-acids used to relieve heartburn and indigestion, ! or to make your blood or urine less acidic in certain conditions. This is because they are alkaline in nature.

Bee stings are acidic. They are also neutralized by rubbing a solution of banana peelings or baking powder on the site which the bee stung.

Properties of acids and bases To investigate the properties of acids and bases, we shall consider the action of acids and bases on different substances.