Acid-Base Titration Concepts

The video provides an overview of acid-base indicators, focusing on their chemical nature as weak acids or bases. It explains how indicators change color when they donate hydrogen ions, using phenolphthalein as a key example. The video details the titration process, emphasizing the importance of reaching the equivalence point where the moles of acid equal the moles of base. It also clarifies the difference between the endpoint and equivalence point in titration. The video concludes with a summary and directs viewers to additional resources for further learning.

What is the primary characteristic of an acid-base indicator?

• It is a strong acid.

• It is a weak organic acid.

• It is a neutral compound.

• It is a strong base.

What happens to an indicator when it loses hydrogen?

• It forms a precipitate.

• It becomes a gas.

• It changes color.

• It dissolves in water.

Which indicator is clear in its acidic form and turns pink when the acid is consumed?

• Phenolphthalein

• Methyl orange

• Litmus

• Bromothymol blue

During a titration, what does the equivalence point indicate?

• The solution has reached its boiling point.

• The moles of acid equal the moles of base.

• The pH is neutral.

• The solution is saturated.

What is the common mistake students make during titration?

• Forgetting to add the titrant.

• Using too much water.

• Forgetting to add the indicator.

• Using the wrong type of flask.

What is the significance of the color change in a titration?

• It means the solution is saturated.

• It indicates the solution is boiling.

• It suggests the solution is too acidic.

• It shows the endpoint has been reached.

What is the endpoint in a titration?

• The point where the indicator changes color.

• The point where the solution becomes neutral.

• The point where the solution freezes.

• The point where the solution boils.

Why is it important to swirl the solution during titration?

• To increase the reaction rate.

• To prevent evaporation.

• To ensure even mixing and reaction.

• To cool down the solution.

What does the term 'analyte' refer to in a titration?

• The flask used in the experiment.

• The base added to the solution.

• The solution being analyzed.

• The indicator used.

How can you determine the molarity of an unknown acid after titration?

• By using the volume and molarity of the base.

• By measuring the temperature change.

• By calculating the moles of hydroxide.

• By observing the color of the solution.