lashaydoee5280 lashaydoee5280
  • 29-03-2024
  • Chemistry
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How often should I push the "CAL" button on the pH meter?
a. Push the "CAL" button on the pH meter every time you conduct a new pH measurement
b. Push the "CAL" button on the pH meter once a day
c. Push the "CAL" button on the pH meter once a week
d. Push the "CAL" button on the pH meter only when the pH measurement seems off

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