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diff --git a/615/CH2/EX2.19/2_19.sce b/615/CH2/EX2.19/2_19.sce
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+//acids and bases//
+//example 2.19//
+k=1.8*10^-5;//dissociation constant of acetic acid//
+M=0.01;//molarity of acetic acid//
+N=M*1;//normality of acetic acid//
+V=1/N;
+a=sqrt(k*V)//degree of dissociation for weak acids//
+printf("degree of dissociation of solution is %f",a);
+H1=a/V;
+H=H1/10^-4;
+printf("\nH+ concentration in solution is %f*10^-4g.ion/lit",H);
+pH=-log10(H1);
+printf("\npH of the solution is %f",pH);
+\ No newline at end of file