Standard electrode potential values, (E^ɵ) for Al^(3+)//Alis -1.66 V and that of Tl^(3+) //Tlis +1.26 V. Predict about the formation of M^(3+) ion in solution and compare the electropositive character of the two metals.

Standard electrode potential values, (E^ɵ) for Al^(3+)//Alis -1.66 V

1.	Standard electrode potential values, (E^ɵ) for Al^(3+)//Alis -1.66 V and that of Tl^(3+) //Tlis +1.26 V. Predict about the formation of M^(3+) ion in solution and compare the electropositive character of the two metals.
Answer» Solution :Standard electrode potential values for two half cell reactions suggest that aluminium has high tendency to make `Al_((AQ))^(3+)`ions, whereas `Tl^(3+)`isnot only unstable in solution but is a powerful oxidising agent also. Thus `Tl^+`is more stable in solution than `Tl^(3+)` . Aluminium being able to FORM +3 ions easily, is more electropositive than thallium.