Question

What is the principal involved in this solutions

Answer 1

$\huge\underline\mathfrak\purple{Answer}$

The solution to be analyzed contains an unknown amount of chemicals. The reagent of unknown concentration reacts with a chemical of an unknown amount in the presence of an indicator (mostly phenolphthalein) to show the end-point.

Answer 2

Explanation:

The solution to be analyzed contains an unknown amount of chemicals. The reagent of unknown concentration reacts with a chemical of an unknown amount in the presence of an indicator (mostly phenolphthalein) to show the end-point..