To determine the concentration of chloride ions in the salt solution using a Chloride ion-selective electrode Cl-ISE with a potential reading of -0.35 V, we need to use the Nernst equation. The Nernst equation relates the potential of an ion-selective electrode to the concentration of the ion being measured.The Nernst equation for a Cl-ISE is:E = E0 + 2.303 * RT/nF * log [Cl-] Where:E = measured potential -0.35 V E0 = standard potential of the Cl-ISE typically provided by the manufacturer or can be found in literature R = gas constant 8.314 J/molK T = temperature in Kelvin assume 298 K if not provided n = number of electrons transferred 1 for Cl- F = Faraday's constant 96485 C/mol First, we need to find the value of E0. If it's not provided, we can assume a typical value for a Cl-ISE, which is around 0.223 V. Now we can plug in the values and solve for [Cl-]:-0.35 V = 0.223 V + 2.303 * 8.314 J/molK * 298 K / 1 * 96485 C/mol * log [Cl-] Solving for [Cl-]:-0.573 V = 0.05916 V * log [Cl-] -9.68 = log [Cl-] [Cl-] = 10^-9.68 [Cl-] 2.07 10^-10 MSo, the concentration of chloride ions in the given salt solution is approximately 2.07 10^-10 M.