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    So I'm carrying out a redox titration to determine the concentration of iron in iron tablets by titrating the iron tablet solution with 0.005 M of potassium manganate (VII) solution. I'm confused as l
    to whether or not I'd need to standardidise the potassium permanganate as I've followed the instructions below to make up the 0.005 M potassium permanganate.

    Measure out 1.58 g of potassium manganate(VII) into a beaker. Add about 500 cm3 of deionised water. Stir and warm gently to dissolve the crystals. Pour the solution into a 2 litre volumetric flask. Add more water to the beaker to dissolve any remaining crystals of potassium manganate(VII). Transfer the solution formed, with washings, to the volumetric flask. Repeat this process until all crystals have been dissolved and transferred to the volumetric flask. Carefully fill the flask to the calibration mark with deionised water. Stopper the flask and shake to ensure a homogeneous solution.

    So would I still need to standardidise this?
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    (Original post by ahfae)
    So I'm carrying out a redox titration to determine the concentration of iron in iron tablets by titrating the iron tablet solution with 0.005 M of potassium manganate (VII) solution. I'm confused as l
    to whether or not I'd need to standardidise the potassium permanganate as I've followed the instructions below to make up the 0.005 M potassium permanganate.

    Measure out 1.58 g of potassium manganate(VII) into a beaker. Add about 500 cm3 of deionised water. Stir and warm gently to dissolve the crystals. Pour the solution into a 2 litre volumetric flask. Add more water to the beaker to dissolve any remaining crystals of potassium manganate(VII). Transfer the solution formed, with washings, to the volumetric flask. Repeat this process until all crystals have been dissolved and transferred to the volumetric flask. Carefully fill the flask to the calibration mark with deionised water. Stopper the flask and shake to ensure a homogeneous solution.

    So would I still need to standardidise this?
    Potassium manganate(VII) is a primary standard and does not require standardising. You make up the solution to the limits of your apparatus and express the uncertainty.
 
 
 
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