Adaptations of experiments to perform from home. Experimental activity Block 2. I. “Acids, Bases and Neutralization Reactions” The practice aims t...

Adaptations of experiments to perform from home. Experimental activity Block 2. I. “Acids, Bases and Neutralization Reactions”

The practice aims to show how purple cabbage can be used to make a natural and cheap pH indicator and build a pH scale with it.
In this practice, the acid-base behavior of some substances will be studied, and different methods of measuring or estimating pH will be used, such as pH paper.
Some vegetables such as strawberries, cherries, plums, purple cabbage (purple cabbage), or red onions, among others, have a substance called cianina.
The indicator obtained will take different colors depending on the pH of the medium from red for the most acidic to blue, green, and yellow in very basic media.
The objectives of the practice are to identify substances as acidic or basic using the pH solution based on purple cabbage leaves and to carry out neutralization reactions using common antacids.