For a solution of 2.5 M H2CO3 (Ka = 4.4 x 10-7), calculate: (a) [H*] (Ь) рH (c) percent ionization

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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**Problem Statement:**

For a solution of 2.5 M H₂CO₃ (Kₐ = 4.4 × 10⁻⁷), calculate:

(a) [H⁺]  
___ M

(b) pH  
___

(c) Percent ionization  
___ %

**Instructions for Calculations:**

1. **[H⁺] Concentration:**
   - Use the formula for the dissociation of a weak acid: H₂CO₃ ⇌ H⁺ + HCO₃⁻
   - Apply the equilibrium expression: \( Kₐ = \frac{[H⁺][HCO₃⁻]}{[H₂CO₃]} \)

2. **pH Calculation:**
   - Calculate pH using the formula: \( \text{pH} = -\log[H⁺] \)

3. **Percent Ionization:**
   - Calculate percent ionization using:  
     \( \text{Percent Ionization} = \left( \frac{[H⁺] \text{ at equilibrium}}{\text{Initial } [H₂CO₃]} \right) \times 100\% \)

Fill in the calculations and solutions for each part as requested.
Transcribed Image Text:**Problem Statement:** For a solution of 2.5 M H₂CO₃ (Kₐ = 4.4 × 10⁻⁷), calculate: (a) [H⁺] ___ M (b) pH ___ (c) Percent ionization ___ % **Instructions for Calculations:** 1. **[H⁺] Concentration:** - Use the formula for the dissociation of a weak acid: H₂CO₃ ⇌ H⁺ + HCO₃⁻ - Apply the equilibrium expression: \( Kₐ = \frac{[H⁺][HCO₃⁻]}{[H₂CO₃]} \) 2. **pH Calculation:** - Calculate pH using the formula: \( \text{pH} = -\log[H⁺] \) 3. **Percent Ionization:** - Calculate percent ionization using: \( \text{Percent Ionization} = \left( \frac{[H⁺] \text{ at equilibrium}}{\text{Initial } [H₂CO₃]} \right) \times 100\% \) Fill in the calculations and solutions for each part as requested.
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