Acid Base Titrations, pH Curves and Buffer Systems

Front

What is an acid-base titration?

Back

A method used to determine the concentration of an acid or base by reacting it with a solution of known concentration.

Front

What is the equivalence point in a titration?

Back

The point at which the amount of titrant added is exactly enough to completely neutralize the analyte solution.

Front

What is a pH curve?

Back

A graph that shows the change in pH of a solution as a function of the volume of titrant added during a titration.

Front

What is a buffer solution?

Back

A solution that resists changes in pH when small amounts of acid or base are added.

Front

What is the role of an indicator in titrations?

Back

An indicator is a substance that changes color at a specific pH level, signaling the end point of the titration.

Front

What is the pH at the equivalence point for a strong acid-strong base titration?

Back

The pH is typically around 7.0.

Front

What is the pH at the equivalence point for a weak acid-strong base titration?

Back

The pH is greater than 7.0.

Front

What is the pH at the equivalence point for a strong acid-weak base titration?

Back

The pH is less than 7.0.

Front

What is a diprotic acid?

Back

An acid that can donate two protons (H+) per molecule.

Front

What is the first equivalence point in a diprotic acid titration?

Back

The point at which the first proton has been completely neutralized by the base.