Standardizing a 0.1 mol/dm³ NaOH solution with HCl is essential due to the variability in NaOH concentration caused by factors such as the lack of a definite composition in NaOH pellets and their tendency to absorb CO2 from the air, which alters their concentration over time. To perform the standardization, a known concentration of HCl is required, typically around 0.1 mol/dm³, but the exact concentration can depend on the specific requirements of the experiment. Proper instruction on this process is often lacking, leading to confusion among students. Understanding the principles of acid-base titration and the importance of accurate concentrations is crucial for successful laboratory work.
