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.2. Calibrate the electrode: Use a chloride ion-selective electrode ISE and calibrate it with standard solutions of known chloride concentrations. This will help you establish a calibration curve, which will be used to determine the concentration of chloride ions in the seawater sample.3. Measure the potential: Immerse the chloride ISE and a reference electrode such as a silver/silver chloride electrode into the seawater sample. Connect the electrodes to a potentiometer or an ion meter, and measure the potential difference voltage between the two electrodes.4. Determine the concentration: Use the calibration curve obtained in step 2 to convert the measured potential difference into the concentration of chloride ions in the seawater sample.Note that the concentration of chloride ions in seawater typically ranges from 18,000 to 20,000 mg/L or 18-20 g/L . However, the actual concentration in your sample may vary depending on the location and time of collection.