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. 2019 Apr 12;12(8):1211. doi: 10.3390/ma12081211
(4) Cu + 2CN− ➝ Cu(CN)2− + e−   Eo = 0.429 V
(5) Cu2+ + e− ➝ Cu+   Eo = 0.161 V
(6) Cu+ + 2CN− ➝ Cu(CN)2−   Eo = 0 V