Question

Connie was making sodium chloride by adding an acid to an alkali. She followed the progress of the reaction with a pH sensor. At which pH would she know that the acid and alkali had completely reacted to give a salt solution?

Answer 1

At a ph of 7.
When an acid and a base (or alkali) react together, they combine to form a salt and water ( and water has a ph of seven)

Answer 2

The value of pH when Connie would know that the acid and alkali had completely reacted to give a salt solution is 7.

What is neutralization reaction?

Those reactions in which an acid and base reacts to form a salt molecule and water molecule is known as neutralization reaction.

According to the question acid reacts with base to form NaCl salt and salt is a neutral molecule, so the pH value of the solution should be 7 when salt is formed. General chemical reaction is represented as:

Acid + Base → Salt + Water

Hence at pH equals to 7, salt will form.

To know more about neutralization reaction, visit the below link:
https://brainly.com/question/2632201