Titration of Oxalic Acid and KMnO4

This video tutorial demonstrates how to titrate KMnO4 using oxalic acid. It begins with an introduction to the required materials and equipment, followed by detailed steps to prepare the necessary solutions. The video then guides viewers through setting up the titration apparatus and performing the titration, including observing the color change to determine the endpoint. Finally, it explains the chemical reaction involved and provides calculations to find the molarity of KMnO4. The tutorial emphasizes accurate measurement and careful observation throughout the process.

What is the concentration of oxalic acid used in the titration?

• 0.1 M

• 1 M

• 0.2 M

• 0.05 M

Which piece of equipment is used to measure 20 milliliters of oxalic acid?

• Funnel

• Pipette

• Beaker

• Burette

What is the purpose of adding dilute H2SO4 to the conical flask?

• To neutralize the solution

• To increase the volume

• To act as a catalyst

• To maintain the acidity of the solution

What is the initial volume of KMnO4 solution filled in the burette?

• 20 mL

• 0 mL

• 50 mL

• 100 mL

At what temperature should the magnetic stirrer be set during the titration?

• 50°C

• 60°C

• 70°C

• 80°C

What color indicates the endpoint of the titration?

• Pale yellow

• Dark purple

• Bright red

• Clear

How many milliliters of KMnO4 solution were used in the titration?

• 80 mL

• 60 mL

• 90 mL

• 70 mL

What is the balanced chemical equation for the reaction between KMnO4 and oxalic acid?

• KMnO4 + H2O + CO2

• K2O + MnO2 + H2O

• K2SO4 + 2MnSO4 + 18H2O + 10CO2

• K2SO4 + MnO2 + CO2

What is the molarity of KMnO4 determined from the titration?

• 0.1 M

• 0.05 M

• 0.01 M

• 0.02 M

How many moles of oxalic acid are used in the reaction?

• 4 moles

• 3 moles

• 5 moles

• 2 moles