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diff --git a/3717/CH10/EX10.12/Ex10_12.sce b/3717/CH10/EX10.12/Ex10_12.sce
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+++ b/3717/CH10/EX10.12/Ex10_12.sce
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+// Ex10_12 Page:224 (2014)
+clc;clear;
+e = 1.6e-019;    // Charge on an electron, C
+epsilon_0 = 8.85e-012;    // Absolute electric permittivity of free space, coulomb-square/N/Sq.m
+r_0 = 0.32e-009;    // Inter-ionic distance of KCl, m
+V = -e/(4*3.14*epsilon_0*r_0);    // Potential energy of K+ and Cl- ions, eV
+printf("\nThe potential energy of K+ and Cl- ions = %5.3f eV", V);
+
+// Result
+// The potential energy of K+ and Cl- ions = -4.498 eV 
+\ No newline at end of file