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March 30, 2017

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Consider titrating an unknown chloride sample with 0.10 +/- 0.01M AgNO3 and the following data:
Initial Buret reading-0.19 +/- 0.02mL
Final Buret reading- 9.26 +/- 0.03mL
Unknown sample mass- 95.0 +/- 0.2mg

Find the weight 5 of Cl- in the sample.

  • Chemistry - ,

    These things are difficult to do on the web but here is the process.
    9.26 +/- 0.02
    -.19 +/- 0.03
    -------------
    9.07 +/-(?)
    ? = sqrt[(0.02^2) + (0.03)^2)]
    ? = 0.036 and that difference is displayed as
    9.07 +/- 0.036

    Then you go to the mass and % by mass.
    [9.07 (+/- 0.036) x 0.1M (+/- 0.01) x 143.34]/95.0 )+/- 0.2) and all of that x 100 to convert to %.
    Do te same kind of thing but this time with the two multiplications and division.
    I can try to answer specific questions but i urge you to look in your text/notes for this topic.

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