Problem 5 Effect on salt on pressure between charged flat plates Consider two parallel flat charged plate with equal (in sign and magnitude) charge density eo and separation between plates d smaller than Gouy-Chapman length rGH. As salt is added to the solution (with Bjerrum length Is) it eventually screens the repulsion between plates. (i) Estimate at what salt concentration c, this screening becomes significant and show that the relation between the corresponding Debye length rp, Gouy-Chapman length ran and plate separation d is ri x racd for d

Problem 5 Effect on salt on pressure between charged flat plates Consider two parallel flat charged plate with equal (in sign and magnitude) charge density eo and separation between plates d smaller than Gouy-Chapman length Gh. As salt is added to the solution (with Bjerrum length ls) it eventually screens the repulsion between plates. (i) Estimate at what salt concentration this screening becomes significant and show that the relation between the corresponding Debye length rp, Gouy-Chapman length rch and plate separation dis rf rocd for drac (ii) Estimate the pressure between charged plates at higher salt concentration (for r/rac