This question concerns acid-base. Below is a schematic diagram of the apparatus used in measuring PH of a solution. What is the name of the right hand electrode? Give the composition of the calomel electrode. Explain briefly how the set-up works in measuring the PH of a solution.

Q: How long would it take to titrate 1.00 mmol H2S with a current of 100.0 mA?

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Q: Identify the components of a pH electrode and explain their functions. Explain throughly.

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Q: Draw the standard hydrogen electrode diagram by writing down the reference electrode types.

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Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.