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Course: CHEM 236, Fall 2008
School: Vanderbilt
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writeup Spectrophotometry The gives two different straight-line relationships for analyzing the data eq 7 on p 67, and the equation in Question 3 on p 71. Both of these involve fitting the reciprocal of the directly measured quantity, A x. While this practice has been standard for at least half a century, it is not the best way to analyze such data. The reason is that if the measured quantity has approximately...

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writeup Spectrophotometry The gives two different straight-line relationships for analyzing the data eq 7 on p 67, and the equation in Question 3 on p 71. Both of these involve fitting the reciprocal of the directly measured quantity, A x. While this practice has been standard for at least half a century, it is not the best way to analyze such data. The reason is that if the measured quantity has approximately constant error, its reciprocal will have a strongly varying error. this!) (Show This means that while a fit of A x itself might be properly unweighted, a fit of its reciprocal should be a strongly weighted fit. After you have obtained estimates of x and K from the indicated straight-line fits, try analyzing the data by means of the following nonlinear fit: Ax [I2]0 = x K [M] 0 1 + K [M] 0 If you really feel motivated, you might try assigning weights to such a fit, taking into account the estimated uncertainty in your [I2]0 values.
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