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diff --git a/615/CH2/EX2.11/2_11.sce b/615/CH2/EX2.11/2_11.sce
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+//acids and bases//
+//example 2.11//
+disp("In the presence of highly ionised NH4Cl,ammonium hydroxide is practically unionised.Thus all NH4+ ions are obtained from the dissociation of NH4Cl");
+k=2.5*10^-5;//dissociation constant of NH4OH//
+N=1/100;//normality of NH4OH//
+C=N;//since volume of solution is one litre//
+NH=C;
+printf("NH4+ concentration is %fg.ion/lit",NH);
+NHOH=C;
+printf("\nNH4OH concentration is %fg.ion/lit",NHOH);
+OH1=k*NHOH/NH;
+OH=OH1/10^-5;
+printf("\nHydroxyl ion concentration in the solution is %f*10^-5",OH);
+a=OH1/N;
+printf("\nDegree of dissociation of the solution is %f",a);
+\ No newline at end of file