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Chemistry, 12.12.2020 22:20 heidiheffron574

Student A rinsed three (3) Erlenmeyer flasks with distilled water and, then, to each was added a 25.00-mL aliquot of dilute hydrochloric acid, HCl(aq) . The solution was titrated to a bromothymol blue end point with standardized aqueous sodium hydroxide, NaOH9aq). Student B, his lab partner, challenged his titration results because Student A failed to wash the Erlenmeyer flask with the HCl solution of unknown concentration. A) Student A is correct because the moles of analyte is related to the HCl aliquot’s volume.

B) Student A made an error since the additional wáter alters the titration’s end point.

C) Student B is correct because moles of analyte are altered by the diluting wáter drops.

D) Student B is not correct because the bromothymol blue indicator is added to the buret.

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Student A rinsed three (3) Erlenmeyer flasks with distilled water and, then, to each was added a 25....
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