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Thread: Percentage of NH3

  1. #1 Percentage of NH3 
    New Member
    Join Date
    Aug 2006
    Location
    Sydney
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    Recently I've done an experiment and we are required to determine the percentage NH3 in the complex by mass.

    I had no problem doing the experiment but stuck in the calculation part

    Really hope someone can help me here!!! >.<

    The experiment was done by titration, the complex we used is... (CuSO4*5H2O + H2O + NH3 + ethanol + acetone) - sorry I don't know how I should call this @.@ But those are the things we used to make that complex...

    First I dissolved 0.2g of the complex with 25mL H2O, & 31.05mL of standardized 0.1M HCl was used to titrate it. Then we are required to find "%NH3"......

    Can someone please kindly tell me (at least the formula that I need to use) to calculate the percentage NH3???? :'(

    Thanks so much!!! :wink:


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  3. #2  
    Forum Ph.D.
    Join Date
    Feb 2005
    Location
    Dublin, Ireland
    Posts
    945
    um, for titrations, and we had to find, either the conc, volume or molarity we used...

    v1 * m1 over n1 = = v2 * m2 over n2

    V=VOLUME(one given one ot be worked, or both given)
    M=MOLARITY (one given one to be worked or both given)
    N= NUMBEROF MOLES (always was given)

    any help?


    Stumble on through life.
    Feel free to correct any false information, which unknown to me, may be included in my posts. (also - let this be a disclaimer)
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