### Ionic Strength Estimation and Development Of Equation For Estimation Of Ion Atmosphere Thickness In Aqueous Solutions By Electrical Conductivity For Some Electrolytes

#### Abstract

The relation between electrical conductivity (cond) and ionic strength (I) in aqueous solutions for some electrolytes (NaCI,NaNO3,Na2CO3,NaSO4,K2SO4,CuSO4,MgSO4.7H2O), has been studied at 25 ◦C, at various concentrations (0.1- 10 molar). The ionic strength was calculated from the measurements of the electrical conductivity. The Factors (F) of these electrolytes have been obtained to certain limits of the concentration from equation (I = F . Cond) .By this method ,we can calculate the ionic strength directly by measuring the conductivity for any unknown sample. This relationship gives more accurate results with a simple and easy method. The ionic strength values obtained from the suggested mathematical relationship was substituted in Debye-Huckle equation to determine activity coefficient(γ±). The results were similar if compared with the calculated values from the general law I=½∑Zi2Ci. The electrical conductivity is increased with increasing of Ionic strength as in the following order :Na2SO4 > K2SO4 > MgSO 4 > CuSO4 And Na2SO4 > Na2CO3 > NaCI > NaNO3

#### Keywords

The relation between electrical conductivity, cond and ionic strength, I in aqueous solutions for some electrolytes, NaCI, NaNO3, Na2CO3, NaSO4, K2SO4, CuSO4, MgSO4.7H2O#### Metrics