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Unformatted text preview: represents the experimental data, and the last column is a modification of the experimental data in order to apply a regression line. This regression line will be used to determine the slope of the data. The slope 0.0095 nm/sec is the rate constant, k. With the rate constant the halflife of Chromic acid can be determined by using the equation ln 2/k, which is 72.96 seconds. This means it takes 72.96 seconds for the initial concentration of decrease by one half. The data appears to correlate with the regression line very well so it is doubtful there are any sources of error....
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 Spring '06
 Van Koppen
 pH

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