A Pt electrode is immersed in a room temperature pH 2.22 solution which is saturated with 0.981 atmosphere H2 gas, giving an interfacial potential (Δφ) that responds to the H2/H+ redox equilibrium. When measured against an Ag/AgCl electrode (4 M NaCl), what is the voltage of the Pt electrode, all at RT? Show all of your work.
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A silver chloride electrode is a type of reference electrode, commonly used in electrochemical measurements. For environmental reasons it has widely replaced the saturated calomel electrode. For example, it is usually the internal reference electrode in pH meters and it is often used as reference in reduction potential measurements. As an example of the latter, the silver chloride electrode is the most commonly used reference electrode for testing cathodic protection corrosion control systems in sea water environments.
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