AP Chem Titrations Practice

Front

What is a titration?

Back

A titration is a laboratory method used to determine the concentration of a solute in a solution by adding a titrant of known concentration until the reaction reaches completion.

Front

What is the equivalence point in a titration?

Back

The equivalence point is the stage in a titration where the amount of titrant added is stoichiometrically equivalent to the amount of substance in the sample solution.

Front

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

Back

The pH at the equivalence point for a strong acid-strong base titration is typically 7.0.

Front

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

Back

The pH at the equivalence point for a weak acid-strong base titration is greater than 7.0 due to the formation of a weak conjugate base.

Front

What is the half-equivalence point in a titration?

Back

The half-equivalence point is the point in a titration where half of the acid has been neutralized by the base, resulting in equal concentrations of the acid and its conjugate base.

Front

How do you determine the pKa of a weak acid from a titration curve?

Back

The pKa of a weak acid can be determined from the half-equivalence point on the titration curve, where pH = pKa.

Front

What is a buffer solution?

Back

A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added, typically composed of a weak acid and its conjugate base.

Front

What is the role of an indicator in a titration?

Back

An indicator is a substance that changes color at a specific pH range, signaling the endpoint of a titration.

Front

What is the formula for calculating the concentration of a solution after titration?

Back

The formula is M1V1 = M2V2, where M is molarity and V is volume for the two solutions involved.

Front

What is the significance of the titration curve?

Back

The titration curve visually represents the change in pH as a function of the volume of titrant added, indicating key points such as the equivalence point.