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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?

Calculate pBa2+ after 75.00 mL of 0.100 M EDTA is added to 50.00 mL of 0.100 M Ba2+. The solution is buffered at pH 10. For the buffered pH of 10, = 0.30. Kf = 7.59 × 107 for BaY2−.

Which statements are TRUE for an aqueous solution of the polyprotic acid H3A? H3A is acidic. H2A− is amphiprotic. HA2− is amphiprotic. A3− is basic.

Calculate pBa2+ when 25.00 mL of 0.100 M is titrated with 25.00 mL of 0.100 M Ba2+. Ksp = 1.1 × 10−10 for BaSO4. (Report to 2 decimal places)