Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each speci to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. relative pH of species 0.1 M aqueous solution HC₂04 7 H₂O* 1 (lowest) (Choose one) ▼ 4 (Choose one) 2 (Choose one) ▼ (Choose one) ▼ H₂PO4 H₂PO4 103 HIO 3 H₂C₂04 H₂O

Organic Chemistry: A Guided Inquiry
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ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter12: Chirality
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Problem 10CTQ
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**Ordering Chemical Species by pH**

**Objective:**
Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. This means imagining making a 0.1 M solution of each species. Select 1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on.

**Instructions:**
Notice that some of the rankings have been filled in for you already. Also, notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions.

**Note for Advanced Students:**
For all charged species, you may assume the necessary counterions act as neither acids nor bases.

### Species Table

| Species   | Relative pH of 0.1 M Aqueous Solution |
|-----------|----------------------------|
| HC₂O₄⁻    | 7                          |
| H₃O⁺     | 1 (lowest)                 |
| H₂PO₄⁻   | (Choose one)               |
| H₃PO₄    | 4                          |
| IO₃⁻    | (Choose one)               |
| HIO₃    | 2                          |
| H₂C₂O₄   | (Choose one)               |
| H₂O     | (Choose one)               |

**Explanation of the Table:**
- **HC₂O₄⁻:** Has a relative pH of 7.
- **H₃O⁺:** Contains the lowest pH value, marked as 1.
- **H₂PO₄⁻, IO₃⁻, H₂C₂O₄, and H₂O:** The relative pH values need to be chosen to complete the ranking.
- **H₃PO₄:** Has a relative pH value of 4.
- **HIO₃:** Has been assigned a relative pH value of 2.

This table aids students in visualizing and understanding how different chemical species influence the pH of an aqueous solution.
Transcribed Image Text:**Ordering Chemical Species by pH** **Objective:** Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. This means imagining making a 0.1 M solution of each species. Select 1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. **Instructions:** Notice that some of the rankings have been filled in for you already. Also, notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. **Note for Advanced Students:** For all charged species, you may assume the necessary counterions act as neither acids nor bases. ### Species Table | Species | Relative pH of 0.1 M Aqueous Solution | |-----------|----------------------------| | HC₂O₄⁻ | 7 | | H₃O⁺ | 1 (lowest) | | H₂PO₄⁻ | (Choose one) | | H₃PO₄ | 4 | | IO₃⁻ | (Choose one) | | HIO₃ | 2 | | H₂C₂O₄ | (Choose one) | | H₂O | (Choose one) | **Explanation of the Table:** - **HC₂O₄⁻:** Has a relative pH of 7. - **H₃O⁺:** Contains the lowest pH value, marked as 1. - **H₂PO₄⁻, IO₃⁻, H₂C₂O₄, and H₂O:** The relative pH values need to be chosen to complete the ranking. - **H₃PO₄:** Has a relative pH value of 4. - **HIO₃:** Has been assigned a relative pH value of 2. This table aids students in visualizing and understanding how different chemical species influence the pH of an aqueous solution.
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