Question

Which describes the equivalence point on a graph of pH versus amount of titrant added to a solution?

a. point on curve with lowest pH
b. point on curve with highest pH
c. point where magnitude of curve is least
d. point where magnitude of slope of curve is greatest

Answer 1

The equivalence point on a graph of pH versus amount of titrant added to a solution depends on the type of titration. In a strong acid-strong base titration, the equivalence point is at pH 7. In a weak acid-strong base titration, the pH is greater than 7 at the equivalence point.

Step-by-step explanation:

The equivalence point on a graph of pH versus amount of titrant added to a solution depends on the type of titration being performed.

For a strong acid-strong base titration, the equivalence point is reached when the moles of acid and base are equal, and the pH is 7.

For a weak acid-strong base titration, the pH is greater than 7 at the equivalence point.