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Solid-phase extraction is a sample preparation technique. Which statement(s) is/are NOT true for an aqueous solid-phase extraction?

A pair of students standardize a sodium hydroxide solution using KHP and obtain the following concentrations: 0.102 8 M, 0.103 1 M, 0.120 0 M, 0.103 0 M, and 0.102 6 M. The students suspect that 0.120 0 M is an outlier. Is 0.120 0 M an outlier and what is the average concentration of the sodium hydroxide solution? Refer to Table 4-6 for critical values of G.

Find the mean of the following data: (report 2 decimal places) [A], [B], [C], [D], [E], [F], [G] 

How many grams of CaCO3 (FM 100.086) are needed to prepare 150.0 mL of an 80.0-ppm Ca2+ solution?

Student’s t is a statistical tool used most frequently to express confidence intervals. compare results from different experiments. evaluate the probability of an experimental value agreeing with a “known” value. determine if a questionable data point should be discarded.

A(n) ____________ titration can be used to determine the concentration of anions that precipitate with certain metal ions by titrating the excess metal ion with EDTA.

Which of the data set(s) is the most accurate? [A], [B] Which of the data set(s) is the most precise? [B] Which of the data set(s) is the most affected by a systematic error? [C] Which data set(s) is the most affected by random error? [A]

For the polyprotic acid H3A, which equilibria and corresponding K value is INCORRECT?

Converting to or from the base unit: [X]  μL to L (Report 3 decimal places)

Which statement regarding electrogravimetric analysis is FALSE?