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OpenStudy (anonymous):
This excel file for spectrophotometry is giving me a negative slope.
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OpenStudy (anonymous):
OpenStudy (xishem):
Your third concentration for the permanganate is listed as being 0.0014. This is more than 10 times larger than all of your other concentrations. Could it have perhaps been a typo? If changed to 0.00014, you actually get a trendline with a very good R^2 value of 0.9992.
OpenStudy (anonymous):
yep! thats it- thank you
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