initial commit / add all books

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+//acids and bases//

+//example 2.20//

+N1=0.2//concentration of acetic acid in g.molecule/lit//

+N2=0.25//concentration of sodium acetate in g.molecule/lit//

+K=1.8*10^-5//ionization constant of acetic acid at room temparature//

+pH1=-log10(K)+log10(N2/N1);

+printf("pH value of the solution before adding HCl is %f",pH1);

+N=1//normality of HCl added//

+V=0.5*10^-3//amount of HCl added in lit//

+M=N*V

+printf("\nThe amount of HCl added in moles is %f",M);

+printf("\nassuming HCl to be completely ionized,the amount of H+ ions added will be %f mole",M);

+printf("\n due to addition of H+ ions the amount of acetic acid will increase and that of salt will correspondingly decrease by %f moles",M);

+C1=N1+M//concentration of CH3COOH in moles/lit//

+C2=N2-M//concentration of CH3COONa in moles/lit//

+pH2=-log10(K)+log10(C2/C1);

+printf("\nThe pH of the solution after adding HCl is %f",pH2);

+pH=pH1-pH2;

+printf("\nThe change of pH is %f",pH);
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