To determine the amount of chloride ions in a water sample using potentiometry, you can use a technique called ion-selective electrode ISE potentiometry. This method involves the use of a chloride ion-selective electrode, which is sensitive to the presence of chloride ions in the solution. Here are the steps to perform this analysis:1. Prepare the water sample: Collect the water sample and filter it if necessary to remove any suspended particles. The sample should be at room temperature for accurate measurements.2. Calibrate the chloride ion-selective electrode: Before using the electrode, it needs to be calibrated with standard solutions containing known concentrations of chloride ions. Prepare a series of standard solutions with different chloride concentrations e.g., 1, 10, and 100 mg/L . Immerse the electrode in each standard solution and measure the potential voltage generated. Plot the potential values against the logarithm of the chloride concentrations to create a calibration curve.3. Measure the potential of the water sample: Rinse the electrode with distilled water and immerse it in the water sample. Allow the potential to stabilize, and then record the value.4. Determine the chloride concentration: Using the recorded potential value, find the corresponding chloride concentration from the calibration curve. This will give you the concentration of chloride ions in the water sample.5. Calculate the amount of chloride ions: Multiply the concentration of chloride ions by the volume of the water sample to obtain the total amount of chloride ions present.By following these steps, you can accurately determine the amount of chloride ions in a water sample using potentiometry with a chloride ion-selective electrode.