To determine the concentration of chloride ions in a sample of seawater using potentiometry, you will need to follow these steps:1. Prepare the sample: Collect a representative sample of seawater and filter it to remove any suspended particles or debris. This will ensure accurate measurements.2. Calibrate the electrode: Before starting the analysis, calibrate your chloride ion-selective electrode ISE using standard solutions with known chloride concentrations. This will help you establish a calibration curve that relates the electrode potential to the chloride ion concentration.3. Measure the potential: Immerse the chloride ISE and a reference electrode e.g., Ag/AgCl in the seawater sample. Connect the electrodes to a high-impedance voltmeter or potentiometer to measure the potential difference between the two electrodes.4. Determine the concentration: Use the calibration curve obtained in step 2 to convert the measured potential difference to the concentration of chloride ions in the seawater sample.Typically, the concentration of chloride ions in seawater ranges from 18,000 to 20,000 mg/L or 0.5 to 0.55 mol/L . However, this value may vary depending on the specific location and environmental conditions.