Vitamin C

• What is the first step in the procedure for testing DCPIP with Vitamin C?

  Transfer 1 cm² of DCPIP solution into a test tube with a pipette.
• What should be added to the DCPIP solution after transferring it to the test tube?

  Add Vitamin C solution to the 1 cm² DCPIP solution.
• Why is it important to record the volume of Vitamin C used in the experiment?

  To determine how much Vitamin C is required to change the colour of the DCPIP.
• How do you add fruit juice to the DCPIP solution in the experiment?

  Use the burette to add the chosen fruit juice until the DCPIP changes colour, then close the tap.
• What should you do after adding fruit juice to the DCPIP solution?

  Work out how the volume of the fruit juice was needed to decolourise the DCPIP and note it down.
• What is the procedure for testing different fruit juices with DCPIP?

  1. Repeat steps with different fruit juices.
  2. Record the volume needed for each juice to decolourise the DCPIP.