How to use a universal pH strip:

1. Dip the end of the strip briefly into the solution you want to test.
2. Remove the strip and wait for the color to develop, typically within seconds.
3. Match the color of the strip to the pH chart provided by the manufacturer. The chart will indicate the corresponding pH level.

Limitations of universal pH strips:

• Accuracy: pH strips provide an estimate of pH, not a precise measurement. They are less accurate than pH meters.
• Sensitivity: The number of color squares on the strip determines its sensitivity. More squares generally provide a more precise range of measurement. The four-color square strips tend to have a lower range of accuracy.

Safety:

• Always handle chemicals and dispose of test strips according to safety guidelines.