Use clean forceps or a glass rod to apply the sample, or dip one end of the paper strip into the liquid.
Primarily used to test for acids. It remains blue in basic or neutral solutions and turns red in acidic ones. litmus paper
Collect 2-3 drops of the sample in a clean vessel or well plate. Use clean forceps or a glass rod to
The primary purpose of litmus paper is to provide a quick, qualitative assessment of a substance's nature. Unlike pH strips or digital meters, it does not provide an exact numerical pH value; instead, it indicates a range where a color change occurs, typically between pH 4.5 and 8.3. Turn blue litmus paper red . Bases: Turn red litmus paper blue . Collect 2-3 drops of the sample in a
It cannot differentiate between weak and strong acids (e.g., pH 1 vs. pH 3). It is also susceptible to interference from other substances in a solution that might affect the dye's appearance.