Question

All potentiometric methods involve the potential measurement between two electrodes - sensing an indicator electrode and a reference electrode. pH measurement is essentially an ion-selective potentiometric measurement similar to the fluoride selective electrode measurements. Why did our pH measurements use only one electrode? b) Ion-selective potentiometric measurements involve the measurement of a potential across a permeable barrier due to concentration differences of the ion of interest. Briefly describe the barrier membrane or sensing element used for either the pH or F electrode (describe one or the other). If our measured potential at an indicator electrode is +0.34 V vs. an SCE reference electrode, what would be the measured potential vs. Standard Hydrogen Electrode? ESCE 0.242 V vs. SHE.

          All potentiometric methods involve the potential measurement between two electrodes - sensing an indicator electrode and a reference electrode. pH measurement is essentially an ion-selective potentiometric measurement similar to the fluoride selective electrode measurements. Why did our pH measurements use only one electrode? 
b) Ion-selective potentiometric measurements involve the measurement of a potential across a permeable barrier due to concentration differences of the ion of interest. Briefly describe the barrier membrane or sensing element used for either the pH or F electrode (describe one or the other). 
If our measured potential at an indicator electrode is +0.34 V vs. an SCE reference electrode, what would be the measured potential vs. Standard Hydrogen Electrode? ESCE 0.242 V vs. SHE.

all potentiometric methods involve the potential measurement between two electrodes sensing o indicator electrode and a reference electrode ph measurement is essentially an ion selective p 98777

Added by Ismael C.

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