How Indigestion Tablets Affect pH: A Universal Indicator Experiment

Universal indicator is a mixture of several different indicators that change color depending on the pH of a solution. The pH of a solution is a measure of its acidity or basicity, and it ranges from 0 to 14. A pH of 7 is neutral, a pH below 7 is acidic, and a pH above 7 is basic.

Indigestion tablets are typically antacids, which means they work by neutralizing stomach acid. Antacids usually contain one or more of the following ingredients: calcium carbonate, magnesium hydroxide, or aluminum hydroxide. These ingredients react with stomach acid to produce water and a salt. The salt is then eliminated from the body through the kidneys.

When an antacid tablet is dissolved in water, it will raise the pH of the solution. This will cause the universal indicator to turn green or blue, depending on the specific concentration of the antacid.