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a) Compare between equivalence point and endpoint. Distinguish which point comes first.

a) Compare between equivalence point and endpoint. Distinguish which point comes first.

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter15: Additional Aqueous Equilibria
Section: Chapter Questions
Problem 123QRT: You are given four different aqueous solutions and told that they each contain NaOH, Na2CO3, NaHCO3,...
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a) Compare between equivalence point and endpoint. Distinguish which point comes first. b) Sulfanilamide, C6H4N2O2S is a sulfonamide antibacterial drug. The purity of sulfanilamide (168.18 g/mol) can be determined by the following steps. First, oxidize sulfur to SO₂ gas. Next, allow SO₂ gas generated to pass through H₂O₂ to produce H₂SO4. The acid is then titrated with NaOH standard solution. Given a 0.5136 g of sulfanilamide sample required an average titre volume of 48.13 mL 0.1251 M NaOH. Suggest a suitable indicator to be used in this titration and predict the purity of sulfanilamide being analysed. (Note: 1 mol sulfanilamide = 1 mol H₂SO4)
Transcribed Image Text:a) Compare between equivalence point and endpoint. Distinguish which point comes first. b) Sulfanilamide, C6H4N2O2S is a sulfonamide antibacterial drug. The purity of sulfanilamide (168.18 g/mol) can be determined by the following steps. First, oxidize sulfur to SO₂ gas. Next, allow SO₂ gas generated to pass through H₂O₂ to produce H₂SO4. The acid is then titrated with NaOH standard solution. Given a 0.5136 g of sulfanilamide sample required an average titre volume of 48.13 mL 0.1251 M NaOH. Suggest a suitable indicator to be used in this titration and predict the purity of sulfanilamide being analysed. (Note: 1 mol sulfanilamide = 1 mol H₂SO4)
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