Titration Concepts and Indicators

This video introduces titration, a lab procedure used to determine the concentration of an unknown solution using a solution of known concentration. It explains the setup involving a conical flask and burette, the roles of analyte and titrant, and the concept of equivalence and end points. The video also discusses the use of indicators to identify the equivalence point through color change, exemplified by phenolphthalein turning pink when neutralized.

What is the primary purpose of a titration?

• To measure the temperature of a solution

• To change the color of a solution

• To mix two solutions thoroughly

• To determine the concentration of an unknown solution

In a titration setup, what is the role of the analyte?

• It is the solution with an unknown concentration

• It is the solution that changes color

• It is the solution that is discarded

• It is the solution with a known concentration

What is the titrant in a titration process?

• The solution that is discarded

• The solution with a known concentration

• The solution with an unknown concentration

• The solution that changes color

What does the equivalence point in a titration signify?

• The point where the solution changes color

• The point where the solution is cooled

• The point where the concentration of analyte and titrant are equal

• The point where the solution is heated

Why is an indicator used in a titration?

• To increase the reaction speed

• To measure the temperature

• To determine the pH level

• To signal the equivalence point

What is the observable event called when the indicator changes color?

• Equivalence point

• End point

• Mid point

• Start point

What property of the indicator causes the color change at the end point?

• Its volume

• Its concentration

• Its property in the acid or base

• Its temperature

In the example given, what color does phenolphthalein turn when the solution becomes alkaline?

• Blue

• Yellow

• Green

• Pink

What does the color change of phenolphthalein indicate in a titration?

• The solution is too cold

• The equivalence point has been reached

• The solution is neutral

• The solution is too hot

What should be done when the indicator changes color during a titration?

• Continue adding titrant

• Stop the titration

• Increase the temperature

• Decrease the temperature