Answer to Question #140478 in General Chemistry for Ashley

Question

Before taking a reading with a pH meter, the glass electrode bulb should be rinsed using:

distilled water.
pH 7 buffer.
the solution to be measured or used in the calibration.
the storage solution.

After rinsing the glass electrode bulb of a pH meter, it should be dried by:

blotting with a paper towel.
rubbing with tissue paper.
shaking.
blotting with tissue paper.

The glass electrode bulb needs to be rinsed and blotted dry between measurements of different solutions to:

calibrate the pH meter.
prevent contaminating the solutions.
allow the bulb to dry out.
prevent the solutions reacting with the glass bulb.

When a pH meter is immersed in a solution, the reading may fluctuate slightly. Which of these values should be recorded?

The highest pH value.
The pH value once the reading has stabilized.
The lowest pH value.
The first pH value.

Answer 1

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