### Titration of Sulfite Ion with Hydrochloric Acid#### Background Information on Sulfurous AcidSulfurous acid (H₂SO₃) is a diprotic acid, meaning it can release two protons (H⁺) during dissociation. The dissociation occurs in two steps, each with its own dissociation constant (pKa):1. **First Dissociation**: \[ \text{H}_2\text{SO}_3 \rightleftharpoons \text{HSO}_3^- + \text{H}^+ \] \[ \text{pKa}_1 = 1.81 \]2. **Second Dissociation**: \[ \text{HSO}_3^- \rightleftharpoons \text{SO}_3^{2-} + \text{H}^+ \] \[ \text{pKa}_2 = 6.91 \]#### Titration Curve AnalysisThe titration curve for sodium sulfite (Na₂SO₃) with standard hydrochloric acid (HCl) is depicted in the graph below. ![Titration Curve](image-link-placeholder)##### Graph Explanation- **Axes**: - The y-axis represents the pH of the solution. - The x-axis represents the volume of HCl added, in milliliters (mL).- **Data Points**: - The graph shows several key points marked as 1, 2, 3, 4, and 5, each corresponding to significant stages in the titration process.- **Titration Stages**: - **V1**: The volume of HCl required to reach the first equivalence point. - **V2**: The volume of HCl required to reach the second equivalence point.- **Curve Description**: - **Point 1**: Represents the initial state before significant HCl addition. - **Point 2**: Indicates an equivalence point where the amount of HCl added equals the amount of the first dissociation of H₂SO₃. - **Point 3**: Represents an intermediate stage after the first equivalence point but before the second equivalence point. - **Point 4**: Denotes the second equivalence point where the amount of HCl added equals the amount of

The titration curve given is, And the titration of Na2SO3 with HCl is given.

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.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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