申論題

IV. A dilute solution is prepared by dissolving a purified monoprotic acid (HE, 50.00 g/mol) into distilled water. Answer questions 14

and 15.

14. The HE solution is titrated with a 0.2000 M Ba(OH)₂ solution. The results of the titration experiments are shown below.

(a) Calculate the mean w/v percentage of the monoprotic acid in the dilute solution. (b) Use Q test to decide if any anomalous result exists

that should be rejected at the 95% confidence level. (Heavy penalty will be applied if this test is not performed.) (c) Calculate the standard

deviation for the results. (d) Calculate the 95% confidence interval for the mean. (e) Assume that the buret used to measure out the acid

solution has a systematic error of -0.05 mL at all volumes delivered and no other sources of errors exist in the experiments. Calculate the

systematic error in the mean result. (See the related tables in the next page.) (13%)