B. Same as Part A, but three determinations are made: Sample 1 Sample 2 Sample 3 mass of sample 0.4892 g 0.3981 g 0.3429 g mass of barium sulfate 0.8462 g 0.6890 g 0.5938 g Find the mass percent SO42- for each sample, the average percent SO42- (mean), and the average deviation from the mean (precision index).

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Answer B, show all work and correct number of sig figs.

A. A water soluble sample containing an unknown amount of sulfate ion weighed 0.4892g. When treated
according to the procedure of this experiment, the sample produced 0.8462g barium sulfate. What is the mass
percent SO42- in the sample?
B. Same as Parl A, but three determinations are made:
Sample 1
Sample 2
Sample 3
mass of sample
0.4892 g
0.3981 g
0.3429 g
mass of barium sulfate
0.8462 g
0.6890 g
0.5938 g
Find the mass percent SO42- for each sample, the average percent SO42- (mean), and the average deviation
from the mean (precision index).
Transcribed Image Text:A. A water soluble sample containing an unknown amount of sulfate ion weighed 0.4892g. When treated according to the procedure of this experiment, the sample produced 0.8462g barium sulfate. What is the mass percent SO42- in the sample? B. Same as Parl A, but three determinations are made: Sample 1 Sample 2 Sample 3 mass of sample 0.4892 g 0.3981 g 0.3429 g mass of barium sulfate 0.8462 g 0.6890 g 0.5938 g Find the mass percent SO42- for each sample, the average percent SO42- (mean), and the average deviation from the mean (precision index).
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