3. A 0.3246 g sample that might contain NaOH, Na₂CO,, NaHCO, or a permissible mixture of the bases is titrated with 0.0828 M HC by the double-indicator method. It is found that 30.38 ml of the acid are required to reach the phenolphthalein end point. Methyl orange is then added to the solution and the titration continued using an additional of 7.83 ml of the acid. Calculate the % of each in the sample?
3. A 0.3246 g sample that might contain NaOH, Na₂CO,, NaHCO, or a permissible mixture of the bases is titrated with 0.0828 M HC by the double-indicator method. It is found that 30.38 ml of the acid are required to reach the phenolphthalein end point. Methyl orange is then added to the solution and the titration continued using an additional of 7.83 ml of the acid. Calculate the % of each in the sample?
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 37QAP: Given three acid-base indicators—methyl orange (end point at pH 4), bromthymol blue (end point at...
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