Answer to Question #94784 in General Chemistry for Sumanth

Question

Conditions necessary to cause colour change at the end point of titration.?

Answer 1

All methods of the end point detection are based on the visible changes of the solution properties. The most obvious selection can be change in solution colour, but also rapid changes in solutions turbidity are easy to spot.

Colour changes at the endpoint of titration but in some cases coloured solution become colourless. It indicate end of a reaction in which one substance has been fully used up. Indicators are used to locate the endpoint but in certain cases reactant or product itself is coloured which at endpoint become colourless or coloured.