Instructor's Solutions Manual to Fundamentals of Analytical by Douglas A. Skoog, Donald M. West, F. James Holler, Stanley

By Douglas A. Skoog, Donald M. West, F. James Holler, Stanley R. Crouch

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9% confident that the laboratories differ. (c) Based on the calculated LSD value laboratories A, C and E differ from laboratory D, but laboratory B does not. Laboratories E and A differ from laboratory B, but laboratory C does not. No significant difference exists between laboratories E and A. 10 Fundamentals of Analytical Chemistry: 9th ed. Chapter 7 Spreadsheet for Pb. 7-26. 11 Fundamentals of Analytical Chemistry: 9th ed. Chapter 7 7-27. (a) H0: µAnalyst1 = µAnalyst2 = µAnalyst3 = µAnalyst4; Ha: at least two of the means differ.

Statistically, we try to obtain a mean value that is an unbiased estimate of the population mean and a variance that is an unbiased estimate of the population variance. 8-3. Step 1: Identify the population from which the sample is to be drawn. Step 2: Collect the gross sample. Step 3: Reduce the gross sample to a laboratory sample, which is a small quantity of homogeneous material 8-4. The gross sample mass is determined by (1) the uncertainty that can be tolerated between the composition of the gross sample and that of the whole, (2) the degree of heterogeneity of the whole, and (3) the level of particle size at which heterogeneity begins.

222. 111. 153. 0883 The volume of the tank is given by 8 Fundamentals of Analytical Chemistry: 9th ed. 301) Next, we propagate the error in volume by assuming the error in pi is negligible. 08) × 105 L m3 6-15. Since the titrant volume equals the final buret reading minus the initial buret reading, we can introduce the values given into the equation for %A. 07 We can now obtain the relative error of the calculation 9 Fundamentals of Analytical Chemistry: 9th ed. 6% 6-16. 01 = se− E / kT e From Table 6-4 − E / kT se − E / kT e − E / kT = s − E / kT s–E/kT can be determined by evaluation of the errors in each of the numbers.

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