Consider the following solutions at 25C. dentity the major species present in each solution and cassity each solution as acidic, basic. or neutral eon L0. 1OM (CHNHC(ag) Major species AcidicBasic/Neutra" L.0.10M NaCN) . Caloulate the pt of 0.10M NaCNag). *assume the temperature is 25C.

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Chapter1: Chemical Foundations
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**Chemistry Study Problem**

Consider the following solutions at 25°C. Identify the major species present in each solution and classify each solution as acidic, basic, or neutral.

### Solution Analysis:

#### Solution I: 0.10M (CH₃)₄NCl(aq)
1. **Major Species:** 

    | Component             | Details                             |
    |-----------------------|-------------------------------------|
    | (CH₃)₄N⁺             | Tetramethylammonium cation          |
    | Cl⁻                   | Chloride anion                      |

2. **Classification:** Neutral

#### Solution II: 0.10M NaCN(aq)
1. **Major Species:** 

    | Component             | Details                             |
    |-----------------------|-------------------------------------|
    | Na⁺                   | Sodium cation                       |
    | CN⁻                   | Cyanide anion                       |
    | H₂O (as solvent)      | Water                               |

2. **Classification:** Basic

### b. Calculate the pH of 0.10M NaCN(aq).

- Assume the temperature is 25°C.

For an educational purpose, explain the solution step-by-step including the reactions involved for determining the pH.
Transcribed Image Text:**Chemistry Study Problem** Consider the following solutions at 25°C. Identify the major species present in each solution and classify each solution as acidic, basic, or neutral. ### Solution Analysis: #### Solution I: 0.10M (CH₃)₄NCl(aq) 1. **Major Species:** | Component | Details | |-----------------------|-------------------------------------| | (CH₃)₄N⁺ | Tetramethylammonium cation | | Cl⁻ | Chloride anion | 2. **Classification:** Neutral #### Solution II: 0.10M NaCN(aq) 1. **Major Species:** | Component | Details | |-----------------------|-------------------------------------| | Na⁺ | Sodium cation | | CN⁻ | Cyanide anion | | H₂O (as solvent) | Water | 2. **Classification:** Basic ### b. Calculate the pH of 0.10M NaCN(aq). - Assume the temperature is 25°C. For an educational purpose, explain the solution step-by-step including the reactions involved for determining the pH.
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