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    I'm planning for a required practical and I'm asked to prepare approx 0.02 mol/dm3 of acidified potassium manganate. I'm provided with 1 mol/dm3 sulfuric acid.

    How would I go about this. I have worked out that 0.79g of KMnO4 is needed but does the acid affect the concentration when added?
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    (Original post by michaelfish1998)
    I'm planning for a required practical and I'm asked to prepare approx 0.02 mol/dm3 of acidified potassium manganate. I'm provided with 1 mol/dm3 sulfuric acid.

    How would I go about this. I have worked out that 0.79g of KMnO4 is needed but does the acid affect the concentration when added?
    no, just use it instead of water...

    ... on a side note, how's the weather?
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    (Original post by charco)
    no, just use it instead of water...

    ... on a side note, how's the weather?
    4)
    Prepare 1000 ml of 0.01 mol/dm3 potassium manganate (VII) solution by weighing out approximately 0.01 moles of potassium manganate (VII) and dissolve it in 100 ml of 2 mol/dm3 sulfuric acid.
    5) This is transferred to a 1000 ml volumetric flask and made up to the mark with deionised water.

    I will probably be making less than 1 litre of the solution

    I found some instructions for making the acidified manganate but this says to use both the acid and water???? any ideas?
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    (Original post by michaelfish1998)
    4)
    Prepare 1000 ml of 0.01 mol/dm3 potassium manganate (VII) solution by weighing out approximately 0.01 moles of potassium manganate (VII) and dissolve it in 100 ml of 2 mol/dm3 sulfuric acid.
    5) This is transferred to a 1000 ml volumetric flask and made up to the mark with deionised water.

    I will probably be making less than 1 litre of the solution

    I found some instructions for making the acidified manganate but this says to use both the acid and water???? any ideas?
    Answered your PM
 
 
 
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