Question

how can you determine whether a neutralisation reaction is complete or not​

Answer 1

Answer:

after the reaction put any indicator in the solution which can change its colour in acid or base and when it doesn't change its colour its proved that neutralization is completed

Answer 2

Explanation:

The use of chemical indicators is applied for the detection of an endpoint of a neutralization reaction.

A neutralization reaction is the type of chemical reaction between an acid and the base producing salt and water.

An equivalent amount of acid and base results in the formation of exactly salt and then water, with no acid or base left.

So, an indicator like litmus, or phenolphthalein, or methyl orange, or methyl red are used to determine at which point of titration it is completed, also called endpoint.