Which of the ff. statements are true about errors in pH measurement? Acid error occurs at very low pH because the glass membrane is saturated with protons. Sodium error occurs at low pH and high concentrations of salt. The electrode may be used between pH 2 and 10 after calibrating with pH 4 and 10 buffer solutions. The pH measurement is taken as soon as the electrode is immersed in the sample solution.
Which of the ff. statements are true about errors in pH measurement? Acid error occurs at very low pH because the glass membrane is saturated with protons. Sodium error occurs at low pH and high concentrations of salt. The electrode may be used between pH 2 and 10 after calibrating with pH 4 and 10 buffer solutions. The pH measurement is taken as soon as the electrode is immersed in the sample solution.
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter17: Electrochemistry
Section: Chapter Questions
Problem 76AP
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Question
pH Glass Electrode (choose 2 or more correct answer each item)
Transcribed Image Text:Which of the ff. statements are true about errors in pH measurement?
Acid error occurs at very low pH because the glass membrane is saturated with
protons.
Sodium error occurs at low pH and high concentrations of salt.
The electrode may be used between pH 2 and 10 after calibrating with pH 4 and 10
buffer solutions.
The pH measurement is taken as soon as the electrode is immersed in the sample
solution.
Transcribed Image Text:Which of the ff. statements are true for a glass pH electrode?
The electrode measures the proton concentration in solution.
The electrode measures the proton activity coefficient in solution.
The electrode measures the potential difference across the glass membrane.
The electrode measures the potential difference across the anode and cathode.
Which of the ff. statements are true for a glass pH electrode?
The electrode must be calibrated using a standard buffer solution, at specific
temperature.
The electrode must be calibrated using 2 standard buffer solutions, within a
temperature range.
The electrode must be calibrated several times within a day.
The electrode must be thoroughly rinsed with distilled water between measurements.
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