A 0.1475-M solution of Ba(OH)2 was used to titrate I M|| the acetic acid (60.05 g/mol) in a dilute aqueous solution. The following results were obtained.
Sample | Sample Volume, mL | Ba(OH)2 Volume, mL |
1 | 50.00 | 43.17 |
2 | 49.50 | 42.68 |
3 | 25.00 | 21.47 |
4 | 50.00 | 43.33 |
(a) Calculate the mean w/v percentage of acetic acid in the sample.
(b) Calculate the standard deviation for the results.
(c) Calculate the 90% confidence interval for the mean.
(d) At the 90% confidence level, could any of the results be discarded?
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