Paper — Litmus

A more versatile option that can turn red in the presence of an acid or blue in the presence of a base. Testing Procedures

Standard testing requires careful handling to avoid contamination. litmus paper

Used for testing the acidity of soil, water, household chemicals (like vinegar or baking soda), and even in medical settings to assess body fluid pH. A more versatile option that can turn red

Collect 2-3 drops of the sample in a clean vessel or well plate. Collect 2-3 drops of the sample in a

Primarily used to test for bases. It remains red in acidic or neutral solutions and turns blue in alkaline ones.

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 .

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.