Consider the following information about sulfurous acid, a diprotic acid (H-SO3). H2SO3 = HSO,+H pKa1= 1.81 HSO,= SO,-+ H pK2=6.91 The titration curve for sodium sulfite, NazSO3, with standard HCl is shown below: pH V1 V2 mL HCl added What are the major species present at point 1? Stop tharing 2.

Consider the following information about sulfurous acid, a diprotic acid (H-SO3). H2SO3 = HSO,+H pKa1= 1.81 HSO,= SO,-+ H pK2=6.91 The titration curve for sodium sulfite, NazSO3, with standard HCl is shown below: pH V1 V2 mL HCl added What are the major species present at point 1? Stop tharing 2.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter14: Principles Of Neutralization Titrations

Section: Chapter Questions

Problem 14.3QAP

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

Consider the following information about sulfurous acıd, a diprotic
acid (H2SO3).
H2SO; = HSO, + H pKa1 = 1.81
HSO,= SO,+ H pK2 = 6.91
The titration curve for sodium sulfite, NazSO3, with standard HCl is
shown below:
2
pH
V2
V1
ML HCl added
What are the major species present at point 1?
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