Indikatorpapier

Indikatorpapier, often translated as indicator paper, is a type of paper impregnated with a pH indicator. pH indicators are chemical substances that change color at specific pH values. When the indicator paper comes into contact with a liquid, the pH indicator reacts with the hydrogen ions (H+) in the solution, causing a visible color change. The color observed is then compared to a color chart provided with the indicator paper to determine the approximate pH of the liquid. This allows for a quick and easy estimation of whether a substance is acidic, neutral, or alkaline.

Different types of indicator papers exist, each sensitive to different pH ranges. Universal indicator paper is designed to show a wide range of colors, allowing for a more precise determination of pH across a broad spectrum. Litmus paper is another common type, which turns red in acidic solutions and blue in alkaline solutions, with purple indicating a neutral pH. Indicator papers are widely used in laboratories, educational settings, and for various practical applications such as testing the pH of water, soil, or household products. It is important to note that indicator paper provides an approximate pH measurement, and for highly accurate readings, electronic pH meters are preferred.