Usage：Quickly determines the acidity and alkalinity of a solution. In chemical experiments, whether during an acid - base neutralization reaction or for a preliminary judgment of the properties of an unknown solution, the approximate pH range of the solution can be rapidly obtained through pH test paper.
Characteristics：It contains chemical reagents sensitive to acidity and alkalinity, and will display different colors when encountering solutions with different pH values. When using it, simply immerse the test paper in the solution or use a glass rod to dip the solution and drop it on the test paper, then compare it with the standard color chart to determine the pH value of the solution.
