Answer to Question #161563 in General Chemistry for mike

Question

Aluminium metal reacts with aqueous acidic solutions (ie those containing H+(aq) to liberate hydrogen gas.)

Write the two half-equations involved in this reaction

 

Write the equation for the overall reaction.

 

Answer 1

Half equations

Al $\to$ Al³⁺ + 3e^-

H₂O $\to$ H⁺ + ^-OH

Overall reaction =

2Al + 3H₂O $\to$ Al₂O₃ + 3H₂