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Composition: pH paper is typically made from absorbent paper strips or sheets that are impregnated with natural pH-sensitive compounds extracted from lichens, such as litmus. Alternatively, synthetic dyes may also be used.pH Range: The paper covers a range of pH values, usually from around 1 to 14. Different types of pH paper may have specific pH ranges depending on the intended applications.Color Changes: The pH indicator compounds in the paper change color in response to the acidity or alkalinity of the solution being tested. The color change corresponds to the pH level of the solution.Red: Indicates acidity (pH less than 7).Blue: Indicates alkalinity (pH greater than 7).Green: Neutral pH (pH of 7).Usage: To use pH paper, a small piece is dipped into the liquid being tested, and the color change is observed. The resulting color can be matched to a provided color chart to determine the pH level of the solution.Accuracy: While pH paper provides a quick and convenient method for approximate pH determination, it may not be as accurate as more sophisticated pH meters or electrodes. However, it is often sufficient for many applications where precise measurements are not critical.Applications: pH paper is widely used in various fields, including laboratories, educational institutions, water quality testing, food and beverage industries, and medical settings.Storage: pH paper should be stored in a dry and cool environment to prevent changes in its sensitivity due to moisture or environmental factors.