Thanks!!!!! As part of an analytical chemistry laboratory course, a student meas

Question

Thanks!!!!!

As part of an analytical chemistry laboratory course, a student measured the Ca2" content in two water samples, city-supplied drinking water and well-supplied drinking water, usina two different analytical methods, flame atomic absorption spectrometry (FAAS) and ETA complexometric titration. The results of this experiment are shown below as the mean Ca2+ concentration (X) ± standard deviation (s) in units of parts per million (ppm). Each sample was measured five times (n = 5) by each method. Method City-Supplied FAAS EDTA Titration Drinking Water (x± s) | Well-Supplied Drinking Water (X± s) 58.61 ± 0.57 ppm 65.22 ± 0.58 ppm 59.36 ± 0.94 ppm 66.07 ± 0.95 ppm

Explanation / Answer

The calculations are as follows

A) tcalc(city) = 0.75

tcalc(well) = 0.85

So we see th values are very close to each other. At 95% confidence level, the values would almost match and thus values would be same.

B) FAAS tcalc = 6.62

EDTA tcalc = 6.71

again here at 95% the values will be same

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