You will also need to calibrate your pH probe. A pH probe is mainly [ Select ] ["glass", "plastic", "metal"] . It [ Select ] ["is", "is not"] fragile and expensive.
To clean a pH probe, [ Select ] ["no cleaning is necessary", "rinse it with distilled water and dab gently with a KimWipe", "wipe it off with a KimWipe", "rinse it in the sink"] . When not in use, ALWAYS place the probe in [ Select ] ["the storage buffer solution", "distilled water", "air"] .
To calibrate the pH probe, first place the probe in the pH 4 solution. Let the voltage stabilize, and [ Select ] ["input a pH of 7.0", "input a pH of 4.0", "record the voltage"] .
Then, [ Select ] ["clean the probe gently with DI water and a Kimwipe", "clean the probe gently with the buffer solution", "shake the pH probe"] . Place the probe in the pH 7 solution, let the voltage stabilize, and [ Select ] ["input a pH of 4.0", "input a pH of 7.0", "record the voltage"] .
If you do not calibrate your pH probe,