Calculate pH for a weak acid/strong base titration. Determine the pH during the titration of 59.5 mL of 0.436 M nitrous acid (K₂ = 4.5x10-4) by 0.436 M NaOH at the following poin (a) Before the addition of any NaOH (b) After the addition of 15.0 mL of NaOH (c) At the half-equivalence point (the titration midpoint) (d) At the equivalence point (e) After the addition of 89.3 mL of NaOH
Calculate pH for a weak acid/strong base titration. Determine the pH during the titration of 59.5 mL of 0.436 M nitrous acid (K₂ = 4.5x10-4) by 0.436 M NaOH at the following poin (a) Before the addition of any NaOH (b) After the addition of 15.0 mL of NaOH (c) At the half-equivalence point (the titration midpoint) (d) At the equivalence point (e) After the addition of 89.3 mL of NaOH
Chemistry
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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
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Transcribed Image Text:**Title: Calculating pH for a Weak Acid/Strong Base Titration**
**Objective:**
Determine the pH during the titration of nitrous acid by sodium hydroxide at various points.
**Experiment Details:**
- **Initial Solution:**
- Volume: 59.5 mL
- Concentration: 0.436 M nitrous acid
- Acid dissociation constant, \( K_a = 4.5 \times 10^{-4} \)
- **Titrant:**
- Concentration: 0.436 M NaOH
**Titration Points:**
(a) **Before the addition of any NaOH:**
Calculate the initial pH of the nitrous acid solution.
(b) **After the addition of 15.0 mL of NaOH:**
Determine the pH after adding a specified volume of the base.
(c) **At the half-equivalence point (the titration midpoint):**
Calculate the pH when half of the acid is neutralized.
(d) **At the equivalence point:**
Determine the pH when the amount of base added completely neutralizes the acid.
(e) **After the addition of 89.3 mL of NaOH:**
Find the pH after adding more base than needed to reach the equivalence point.
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