pH and temperature experiment

pH and temperature experiment

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: pH and temperature experiment. Student using a probe connected to a datalogger to record the pH and temperature of the water in a pond or river. pH levels, which indicate the concentration of hydrogen ions, show the relative acidity or alkalinity of the water. This pH of 7.52 is close to neutral, while the temperature is 25 degrees Celsius. For a close-up of the datalogger, see C011/4562.

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