Identify each species in the following equilibrium according to the code:
SA = stronger acid , SB = stronger base , WA = weaker acid , WB = weaker base.
The `pK_a` of `(CH_3)_2NH` is 36, the `pK_a` of `CH_3OH` is 15.2.
`underset(1)(CH_3OH)+underset(2)((CH_3)_(2))NHhArrCH_3-O^(-) +CH_3-underset(H)underset(|)(overset(+)(NH))-CH_3`

Options

A. `{:(1,2),(WA,WB):}`
B. `{:(1,2),(WB,WA):}`
C. `{:(1,2),(SA,SB):}`
D. `{:(1,2),(SB,SA):}`

Explanation

To identify each species in the given equilibrium according to the specified codes (SA = stronger acid, SB = stronger base, WA = weaker acid, WB = weaker base), we will analyze the provided pKa values and the reaction.

### Step-by-Step Solution:

1. **Identify the Species**: The reaction given is:
\[ \text{CH}_3\text{OH} + \text{(CH}_3)_2\text{NH} \rightleftharpoons \text{CH}_3\text{O}^- + \text{CH}_3\text{NH}_3^+ \]

2. **Determine the pKa Values**:
- The pKa of \((CH_3)_2NH\) is 36. This indicates that it is a very weak acid because a high pKa value corresponds to a low dissociation constant (Ka).
- The pKa of \(CH_3OH\) is 15.2. This indicates that it is a stronger acid compared to \((CH_3)_2NH\) since a lower pKa value corresponds to a higher dissociation constant.

3. **Identify the Acid and Base**:
- In the reaction, \(CH_3OH\) donates a proton (H⁺) to \((CH_3)_2NH\), which means \(CH_3OH\) acts as an acid.
- The species \((CH_3)_2NH\) accepts the proton and becomes \((CH_3)NH_3^+\), indicating that it acts as a base.

4. **Classify the Acids and Bases**:
- Since \(CH_3OH\) has a pKa of 15.2, it is a weak acid (WA).
- Since \((CH_3)_2NH\) has a very high pKa of 36, it is a weaker acid (WA) and, when it accepts a proton, it forms \((CH_3)NH_3^+\), which is a conjugate acid.
- The conjugate base formed from \(CH_3OH\) is \(CH_3O^-\), which is a stronger base (SB) compared to \((CH_3)_2NH\).

5. **Final Classification**:
- \(CH_3OH\) = WA (weaker acid)
- \((CH_3)_2NH\) = WB (weaker base)
- \(CH_3O^-\) = SB (stronger base)
- \(CH_3NH_3^+\) = SA (stronger acid)

### Summary of Identifications:
- **CH3OH** = WA (weaker acid)
- **(CH3)2NH** = WB (weaker base)
- **CH3O^-** = SB (stronger base)
- **CH3NH3^+** = SA (stronger acid)