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    I have a mixture of 50cm3 0.02M iodine, 25cm3 1M propanone and 25cm3 2M HCl in a flask
    and every 3 mins i took 10cm3 out and titrated it

    at 3 minutes i took 10cm3 of the mixture out and quenched it with sodium hydrogen carbonate
    then titrated with 0.005M sodium thiosulphate and it took 34.5cm3 to neutralise the iodine

    how do i find the concentration of iodine that was neutralised? i know
    M1V1 = M2V2 but i dont know the volume of iodine in the 10cm3 sample?

    i need to find the concentration of iodine so i can plot conc against time and find the order but im stuck help!
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    halp plz?
    i found the moles in 34.5cm3 and it's 1.725 * 10^-4
    and the mole ratio in the equation is 2thio : 1iodine
    so moles of iodine = 8.625 * 10^-5
    volume = 8.625 * 10^-5/ 0.02
    = 4.3125 cm3

    so conc = moles/ volume
    = 0.02/ (4.3125/1000)
    =4.6377 mol/dm3

    is that right? :lol:
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    apronedsamurai
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    What's this for? you seem to be in a rush lol
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    (Original post by Squishy™)
    What's this for? you seem to be in a rush lol
    coursework that's due tomorrow dfaoifjoewijdw :eek:
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    (Original post by FormallyIndecent)
    coursework that's due tomorrow dfaoifjoewijdw :eek:
    Level?
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    (Original post by Squishy™)
    Level?
    A2
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    (Original post by FormallyIndecent)
    A2
    board?
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    (Original post by Squishy™)
    board?
    OCR B
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    (Original post by FormallyIndecent)
    OCR B
    I don't know why asking that was necessary, i would do it but its 00:21 n i'm going bed. Soz boss
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    (Original post by Squishy™)
    I don't know why asking that was necessary, i would do it but its 00:21 n i'm going bed. Soz boss
    kk goodnight
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    bump?
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    Bumping to help out a friend x
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    FormallyIndecent You still need help?
 
 
 
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