log C Below is a logC-pH diagram for different carbonate species (i.e., H₂CO3, HCO3, and CO32-) in an open system in equilibrium with air. Determine the carbonate species (i.e., H₂CO3, HCO3, or CO32) that A, B, and C represent, respectively. 2 0 -2 -4 -6 -8 -10 -12 -14 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 0 B 2 A 4 pKal 6 pH C 8 10 12 PK ₁2 14 A: B: C:

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Below is a logC-pH diagram for different carbonate species (i.e., H₂CO₃, HCO₃⁻, and CO₃²⁻) in an open system in equilibrium with air. Determine the carbonate species (i.e., H₂CO₃, HCO₃⁻, or CO₃²⁻) that A, B, and C represent, respectively.

**Diagram Explanation:**

- **Axes:**
  - Horizontal axis: pH, ranging from 0 to 14.
  - Vertical axis: log C (concentration), ranging from -14 to 2.

- **Lines:**
  - A constant horizontal line represents the species labeled as A around pH 4.
  - A diagonal line with a positive slope intersects the pH axis at lower pH levels and extends upwards, representing B around pH 6.
  - Another diagonal line with a steeper positive slope, extending further, represents C around pH 9.

- **Vertical markers:**
  - There are two vertical dashed lines labeled pK_a1 near pH 6 and pK_a2 near pH 10, indicating the pKa values of the carbonic acid system.

**Species Identification:**

- **A:** _____
- **B:** _____
- **C:** _____
Transcribed Image Text:Below is a logC-pH diagram for different carbonate species (i.e., H₂CO₃, HCO₃⁻, and CO₃²⁻) in an open system in equilibrium with air. Determine the carbonate species (i.e., H₂CO₃, HCO₃⁻, or CO₃²⁻) that A, B, and C represent, respectively. **Diagram Explanation:** - **Axes:** - Horizontal axis: pH, ranging from 0 to 14. - Vertical axis: log C (concentration), ranging from -14 to 2. - **Lines:** - A constant horizontal line represents the species labeled as A around pH 4. - A diagonal line with a positive slope intersects the pH axis at lower pH levels and extends upwards, representing B around pH 6. - Another diagonal line with a steeper positive slope, extending further, represents C around pH 9. - **Vertical markers:** - There are two vertical dashed lines labeled pK_a1 near pH 6 and pK_a2 near pH 10, indicating the pKa values of the carbonic acid system. **Species Identification:** - **A:** _____ - **B:** _____ - **C:** _____
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