To calculate the pH of a 0.001 M NaCl solution, it's important to note that sodium chloride is a strong electrolyte that dissociates completely in water, resulting in a neutral solution. The reaction NaCl + H2O does not produce significant amounts of HCl or NaOH that would alter the pH, which ideally remains at 7. While ionic strength and activity coefficients are relevant in buffer preparation, they do not significantly impact the pH in this scenario. However, it is acknowledged that the addition of neutral salts can influence pH in other contexts. Thus, a NaCl solution at this concentration should maintain a neutral pH of 7.
