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The Acid in Your Stomach Lab Writeup

September 20, 2010

Antacid Lab

Questions to go along with the lab!

1) What makes an acid an acid? – If a substance on the pH scale is lower than 7 then it is automatically considered an acid. Acids are substances that have to much hydrogen ions, thus making it lower on the pH scale. A great example of an acid is hydrochloric acid (note how it starts with a hydrogen)

2) What makes a base a base? – If a substance on the pH scale is higher than 7 then it is automatically considered a base. Bases are substances that have to much hydroxide ions, thus making it higher on the pH scale. A great example of a base is sodium hydroxide or NaOH.

3) Why is water neutral? – Water is neutral because on the pH scale it is 7. It is at balance between the hydrogen ions and the hydroxide ions. Note that H + OH = H2O = water!!!

4) How do antacids work? Antacids work in a very simple way. Basically the antacid is a base and when it enters your stomach, it lowers the acidic levels in your stomach. It does this because when you combine an acid with a base the two neutralize. Thus making the pain in your stomach go away and bringing your stomach acid levels back to normal.

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