indicatorpapier

Indicatorpapier, also known as pH paper or litmus paper, is a strip of paper that has been treated with a pH indicator substance. These indicators are compounds that change color depending on the acidity or alkalinity of a solution. When a strip of indicator paper is dipped into a liquid, the indicator reacts with the hydrogen ions (or hydroxide ions) present, causing a visible color change.

The color observed on the indicator paper can then be compared to a color chart provided with the paper. This chart shows the corresponding pH value for each color. pH is a measure of how acidic or basic a substance is, with a pH of 7 being neutral, values below 7 being acidic, and values above 7 being alkaline (or basic). Indicator papers are widely used in laboratories, schools, and even in households for quick and simple pH testing. They are a cost-effective and convenient way to determine the approximate pH of a substance without the need for more complex equipment. Different types of indicator papers exist, offering varying degrees of pH range and precision.