density of water =1 g/cc
volume of water (v) = m/D = 100/1 = 100 ml
concentration of Kcl = n/V in L
                   Â
= 0.01/0.1 = 0.001 M
concentration of MgCl2 = n/Vin L
                       Â
= 0.005/0.1
                      Â
= 0.0005 M
  concentration of MgSO4 = n/Vin
L
                       Â
= 0.002/0.1
                      Â
= 0.0002 M
Ionic strength(I) = 1/2*epsilon(Ci*Zi^2)
Ci = molarconcentration of ion i
Zi = charge number of ion i
I =
1/2([K+]*(+1)^2+[Cl-]*(-1)^2+[Mg^2+]*(+2)^2+[Cl-]*(-1)^2+[Mg^2+]*(+2)^2+[SO4^2-]*(-2)^2)
   =
1/2*((0.001*(+1)^2)+(0.001*(-1)^2)+(0.0005*(+2)^2)+(0.0005*2*(-1)^2)+(0.0002*(+2)^2)+(0.0002*(-2)^2))
Ionicstrength(I) = 0.0033 M
