To use a pH meter correctly, you need to: A. Dip it into the solution quickly. B. Wash it with water after each use. C. Ignore the calibration before measurement. D. Use it to measure solutions beyond its range. 相关知识点:
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Place the reading end of the pH meter into a standardized solution. Step 2 Compare the reading on the meter with the known pH of the solution. Step 3 Use the calibration buttons to change the reading on the meter until it matches that of the standardized solution. ...