TWrite the half reactions for Ag/AgCl reference electrode and the SCE reference electrode
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Write the half-reaction for the silver-silver chloride reference electrode. Include physical states. half-reaction: AgCl(s) + e- → Ag(s) + Cl-(aq) Write the half-reaction for the saturated calomel reference electrode. Include physical states. half-reaction: Hg2Cl2(s) + 2 e- → 2 Hg(l) + 2 Cl-(aq) What is the potential of the cell silver-silver chloride electrode || saturated calomel electrode given that the potential for the Ag|AgCl electrode in a saturated KCl solution is +0.197 V and the potential for a saturated calomel electrode is +0.241 V? E = 0.044 V
Aparna S.
Sri K.
The saturated calomel electrode, abbreviated SCE, is often used as a reference electrode in making electrochemical measurements. The SCE is composed of mercury in contact with a saturated solution of calomel (Hg2Cl2). The electrolyte solution is saturated KCl. ESCE is +0.242 V relative to the standard hydrogen electrode. Calculate the potential for each of the following galvanic cells containing a saturated calomel electrode and the given half-cell components at standard conditions. In each case, indicate whether the SCE is the cathode or the anode. Standard reduction potentials are found in the Standard Reduction Potentials table. a.) Cd2+ + 2 e- → Cd b.) Sn2+ + 2 e- → Sn c.) AuCl4- + 3 e- → Au + 4 Cl-
Adi S.
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