What is the concentration of chloride ions (Cl-) in a 500 mL solution if the potential difference between the reference electrode and the indicator electrode is measured at 0.84 V using a silver-silver chloride electrode? The sample contains an unknown amount of chloride ions and was titrated with a standard solution of silver ions (Ag+) until the equivalence point was reached. The titrant used in the experiment had a concentration of 0.1 M.

Question

What is the concentration of chloride ions (Cl-) in a 500 mL solution if the potential difference between the reference electrode and the indicator electrode is measured at 0.84 V using a silver-silver chloride electrode? The sample contains an unknown amount of chloride ions and was titrated with a standard solution of silver ions (Ag+) until the equivalence point was reached. The titrant u

Answer 1

To determine the concentration of chloride ions in the solution, we need to use the Nernst equation, which relates the potential difference  E  to the concentration of ions in the solution. The Nernst equation for the silver-silver chloride electrode is given by:E = E +  RT/nF  * ln [Ag+]/[Cl-] where:E = measured potential difference  0.84 V E = standard electrode potential for the Ag+/AgCl electrode  0.222 V R = gas constant  8.314 J/mol K T = temperature  assuming 298 K, room temperature n = number of electrons transferred  1 for Ag+/AgCl F = Faraday's constant  96485 C/mol [Ag+] = concentration of silver ions in the titrant  0.1 M [Cl-] = concentration of chloride ions in the solution  unknown We can rearrange the equation to solve for [Cl-]:[Cl-] = [Ag+] * exp  E - E  * nF / RT Plugging in the values:[Cl-] = 0.1 * exp  0.84 - 0.222  * 1 * 96485 /  8.314 * 298  [Cl-]  0.1 * exp 61.8 [Cl-]  0.1 * 4.15 * 10^26[Cl-]  4.15 * 10^25 MThis value is not realistic for a concentration of chloride ions in a solution. There must be an error in the given information or the experimental setup. Please double-check the provided data and ensure that the potential difference and other parameters are accurate.