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+//Chapter 6 Solutions of Electrolytes
+
+clc;
+clear;
+
+//Initialisation of Variables
+M= 0.001 //molar
+M1= 0.002 //molar
+M2= 0.004 //molar
+n= 1 //moles
+n1= 2 //moles
+v= 0.509
+
+//CALCULATIONS
+Is= 0.5*(M*n**2+M1*n**2+M1*n1**2+M2*n**2)
+r= 10**(-v*n**2*sqrt(Is))*M
+r1= 10**(-v*n1**2*sqrt(Is))*M1
+
+//RESULTS
+mprintf("Ionic strength= %.3f",Is)
+mprintf("\nActivity of sodium = %.4f molar",r)
+mprintf("\nActivity of barium = %.4f molar",r1)