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diff --git a/3718/CH6/EX6.12/Ex6_12.sce b/3718/CH6/EX6.12/Ex6_12.sce
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+//Chapter 6: Electrochemistry
+//Problem: 12
+clc;
+
+//Declaration of Variables
+E_KCl = 0.2415       // V
+E_cell = 0.445       // V
+
+
+// Solution
+mprintf("Emf of the cell is\n")
+mprintf(" At 25C,\n")
+mprintf(" E = Er - El = Eref - ((RT)/ F) * ln H+\n")
+
+pH = (E_cell - E_KCl) / 0.059
+Eo_cell = - 0.8277    // V
+
+mprintf(" Thus, equilibrium constant for the reaction\n")
+mprintf(" 2H2O --> H3O+  + OH- may be calculated as\n")
+
+K = 10 ** (Eo_cell / 0.0591)
+
+mprintf(" K = %.e",K)