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+//ques-5.25
+//Calculating pH of a buffer solution
+clc
+Ka=1.8*10^-5;
+m1=0.2;//moles of acetic acid
+m2=0.1;//moles of sodium acetate
+p=-log10(Ka)+log10(m2/m1);
+printf("pH of the given buffer is %.4f.",p);