Iodide and Hydrogen Peroxide Reactions

The video tutorial explains the kinetic study of the reaction between iodide ions and hydrogen peroxide. It details the materials required, the experimental procedure, and the precautions to be taken. The experiment involves monitoring the reaction rate by observing the appearance of a blue color, which indicates the completion of the reaction. The video also highlights the importance of using freshly prepared solutions for accurate results.

What role does hydrogen peroxide play in the reaction with iodide ions?

• It acts as a solvent.

• It acts as a reducing agent.

• It acts as a catalyst.

• It acts as an oxidizing agent.

What is the main objective of the experiment involving iodide ions and hydrogen peroxide?

• To determine the solubility of iodide ions.

• To study the reaction rate at different concentrations of iodide ions.

• To measure the pH change during the reaction.

• To observe the color change of hydrogen peroxide.

Which of the following is NOT a material required for the experiment?

• Sodium thiosulfate solution

• Potassium iodide solution

• Starch solution

• Sodium chloride solution

What is the purpose of adding starch solution to the reaction mixture?

• To act as a catalyst.

• To stabilize the reaction.

• To neutralize the solution.

• To indicate the endpoint by forming a blue color.

How is the reaction monitored in the experiment?

• By measuring the temperature change.

• By observing the appearance of a blue color.

• By checking the pH level.

• By measuring the gas evolved.

What is plotted on the ordinate of the graph in the analysis?

• Time taken for blue color appearance

• Volume of potassium iodide

• Concentration of hydrogen peroxide

• Temperature of the reaction

What conclusion can be drawn from the graph plotted in the experiment?

• The reaction rate is independent of iodide concentration.

• The reaction rate decreases with increased iodide concentration.

• The reaction rate is constant regardless of conditions.

• The reaction rate increases with increased iodide concentration.

Why is it important to use freshly prepared sodium thiosulfate solution?

• To ensure accurate concentration.

• To maintain pH balance.

• To prevent contamination.

• To avoid color change.

What should be the concentration relationship between potassium iodide and sodium thiosulfate?

• Concentration does not matter.

• Both should have the same concentration.

• Potassium iodide should be more concentrated.

• Potassium iodide should be less concentrated.

What precaution should be taken regarding the starch solution?

• It should be mixed with sodium thiosulfate.

• It should be freshly prepared.

• It should be heated before use.

• It should be diluted.