The Helmholtz model of the electric double layer is equivalent to a parallel plate
Chapter 25, Problem 25.15(a)(choose chapter or problem)
The Helmholtz model of the electric double layer is equivalent to a parallel plate capacitor. Hence the potential difference across the double layer is given by =d/, where d is the distance between the plates and is the surface charge density. Assuming that this model holds for concentrated salt solutions calculate the magnitude of the electric field at the surface of silica in 5.0 M NaCl(aq) if the surface charge density is 0.10 C m2.
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