NaOH is known to be adeliquescent substance, so it has to be standardized using KHP before used for analysis.
What is a primary standard?
A primary standard is a substance whose standard solution can be prepared using the solid. Such a substance must be pure and non-deliquescent.
Since NaOH is a deliquescent substance, it must therefore always be standardized using KHP before used for analysis.
Learn more about KHP: https://brainly.com/question/25893661
