The document discusses potentiometric titrations, focusing on reference and indicator electrodes, including the standard hydrogen electrode, calomel electrode, and silver/silver chloride electrode. It also mentions different types of indicator electrodes such as first and second kind electrodes, and inert redox electrodes. Additionally, the document covers glass indicator electrodes used for measuring pH.

1. Potentiometric
Amit Z Chaudhari
Titrations

2. 2
I n t r o
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P r i n c i p l e
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P r i n c i p l e
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P o t e n t i o m e t r i c C e l l

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P r i n c i p l e
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1. Standard hydrogen electrode (SHE)/
Normal Hydrogen Electrode
(NHE)
Synonym - The primary reference electrode.
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1. Standard hydrogen electrode (SHE)
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1. Standard hydrogen electrode (SHE)
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2. Calomel electrode / Saturated Calomel electrode (SCE)
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2. Calomel electrode / Saturated Calomel electrode (SCE)
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2. Calomel electrode
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2. Calomel electrode
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2. Calomel electrode
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3. Silver/ silver chloride electrode
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3. Silver/ silver chloride electrode
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Characteristic :
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Applications:
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Metallic Indicator Electrodes :
- Simple indicator electrode will usually consist of a carefully cleaned
rod or wire of the appropriate metal
Class
1. electrodes of the first kind
2. electrodes of the second kind
3. inert redox electrodes
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Metallic Indicator Electrodes :
1. Electrodes of the first kind
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Metallic Indicator Electrodes :
2. Electrodes of the second kind
and
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Metallic Indicator Electrodes :
3. Inert redox electrodes
- relatively inert conductors respond to redox systems.
Such materials as platinum, gold, palladium, and carbon can be used
to monitor redox systems.
- E.g. For example, the potential of a platinum electrode immersed in a
solution containing cerium(III) and cerium(IV) is …
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Glass Indicator Electrodes :
typical cell for measuring pH
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I n d i c a t o r E l e c t r o d e
Glass Indicator Electrodes :
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Glass Indicator Electrodes :
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Glass Indicator Electrodes :
Glass cell
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Glass Indicator Electrodes :
Potential measurement
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Glass Indicator Electrodes :
I n d i c a t o r E l e c t r o d e
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Glass Indicator Electrodes :
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31. End of
topic
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