Emirates International School
Grade 13
Drugs and medicines (Antacids)
Name:………………………………………………….
Date:………………………………………
1. The normal pH of gastric juices is in the 1.0 – 3.0 range. State two purposes of this acidic solution
and explain what causes heartburn.
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2. Describe what an antacid is made of and explain its purpose.
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3. Name four antacids each containing a different metal.
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4. For each antacid in (3) above, write a balanced chemical equation for its reaction with excess
stomach acid.
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5. Explain why some antacids contain the chemical called dimethicone.
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Emirates International School
Grade 13
Drugs and medicines (Antacids)
Name:………………………………………………….
Date:………………………………………
6. Two solid antacid products containing the same mass of diἀerent active ingredients are on sale for
the same price. One contains magnesium hydroxide, the other calcium carbonate as the active
ingredient. Without detailed calculations, deduce which one is a better buy and explain your
reasoning.
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