a)When creating an electrochemical cell, why is it important to prevent the reactants from any direct contact? b)Corrosion is a redox reaction that is responsible for the failure of many water mains.  These are the pipes that transport water to homes and businesses.  Research and describe the economic, health and safety issues associated with the rupture and repair of water mains.  Describe the methods used to improve the situation. (~250 words) Include references in APA format.

Q: 2. Balance the following half-reaction in an acidic solution: Cr,0," Cra. ↑

A: The given half cell reaction is as follows: Cr2O72- → Cr3+ The half cell reaction can be balanced by…

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A: Electrochemical cells

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Q: 1. Using data in Table 1 (see next page), calculate the standard emf for a cell that employs the…

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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.