Question

If one uses a pH meter to chart the change in pH (y) as a function of volume of titrant added (x): A good approximation can be made of the Equivalence point by?

Answer 1

The equivalence point in a titration can be approximated by identifying the midpoint of the vertical section of the titration curve, which indicates where the pH changes most rapidly and where equivalent quantities of acid and base are present.

Step-by-step explanation:

A good approximation of the equivalence point during a titration can be made by identifying the midpoint of the vertical section of the titration curve, which represents the point of inflection. This is the point where equivalent quantities of acid and base are present, and the pH changes most rapidly. For the titration of a strong acid with a strong base, the equivalence point occurs at a pH of 7.00. However, in a titration of a weak acid with a strong base, such as the one depicted in the provided graph with NaOH as the titrant, the equivalence point will occur at a pH greater than 7.00, specifically at the midpoint pH of 8.72 as indicated by the curve.