A cell is constructed from a 1?2 cell consisting of a copper wire in a solution of 100mL of 0.10 M Cu2+ buffered at a pH= 9 and a saturated calomel electrode (SCE)for the other 1?2 cell. The SCE has a potential of 0.242 V relative to a standard hydrogen electrode. The cell is measured to have a spontaneous potential of 0.0675 V, with the copper 1?2 cell functioning as the cathode and the SCE as the anode. A 0.30 M solution of EDTA buffered at a pH= 9 is then added to the Cuhalf-cell. For pH=9, a4 is 0.054. The formation constant for CuY= is 6 x 1018. You don
A cell is constructed from a 1?2 cell consisting of a copper wire in a solution of 100mL of 0.10 M Cu2+ buffered at a pH= 9 and a saturated calomel electrode (SCE)for the other 1?2 cell. The SCE has a potential of 0.242 V relative to a standard hydrogen electrode. The cell is measured to have a spontaneous potential of 0.0675 V, with the copper 1?2 cell functioning as the cathode and the SCE as the anode. A 0.30 M solution of EDTA buffered at a pH= 9 is then added to the Cuhalf-cell. For pH=9, a4 is 0.054. The formation constant for CuY= is 6 x 1018. You don
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Related questions
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 KCl. ESCE is +0.242 V relative to standard hydrogen electrode.
Calculate the potential for each of the 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 table:
| Electrode |
SCE |
a) Cu2+ + 2e- → Cu | b) Fe3+ + e- → Fe2+ | c) AgCl + e- → Ag + Cl- | d) Al3+ + 3e- → Al | e) Ni2+ + 2e- → Ni |
| Eo |
+0.242 V |
+ 0.339 V | + 0.771 V | + 0.223 V | - 1.677 V | - 0.257 V |
