Standard electrode potential values, `E^(@)` at `Al^(3+)//Al` is `-1.66 V` and that of `Tl^(3+)//Tl` is `+1.26 V`. Predict about the formation of `M^(3+)` ions in solution and compare the electropositive character of the two metals.

Explanation

To analyze the formation of \( M^{3+} \) ions in solution and compare the electropositive character of aluminum (Al) and thallium (Tl), we can follow these steps:

### Step 1: Understand the Standard Electrode Potential Values
The standard electrode potential values given are:
- For aluminum: \( E^\circ (Al^{3+}/Al) = -1.66 \, V \)
- For thallium: \( E^\circ (Tl^{3+}/Tl) = +1.26 \, V \)

### Step 2: Predict the Formation of \( M^{3+} \) Ions
...