Electrolysis of Aluminium Oxide producing Al but Al > H in reactivity?? Watch

nwmyname
Badges: 13
Rep:
?
#1
Report Thread starter 2 years ago
#1
In a discussion, I was told Aluminium Oxide would be electrolysed and Aluminium would be formed.

However, in my GCSE studies, Hydrogen would be discharged unless the Metal was less reactive than Hydrogen in the reactivity series.

Aluminium is more reactive, so Hydrogen should be discharged, not aluminium.

Why is this not the case?
0
reply
DanielDaniels
Badges: 14
Rep:
?
#2
Report 2 years ago
#2
(Original post by nwmyname)
In a discussion, I was told Aluminium Oxide would be electrolysed and Aluminium would be formed.

However, in my GCSE studies, Hydrogen would be discharged unless the Metal was less reactive than Hydrogen in the reactivity series.

Aluminium is more reactive, so Hydrogen should be discharged, not aluminium.

Why is this not the case?
because it is higher in the reactivity series, we use electrolysis to extract aluminium. aluminium ions will gain the electrons from the cathode.
0
reply
Pigster
Badges: 17
Rep:
?
#3
Report 2 years ago
#3
Al2O3 isn't dissolved in water, so there isn't any hydrogen to be discharged.

Also, it doesn't even dissolve in water.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of Warwick
    Undergraduate Open Day Undergraduate
    Fri, 21 Jun '19
  • University of Bath
    Find out about life at the University and discover our diverse range of Undergraduate courses. Our course areas include the Sciences, Humanities & Social Sciences, Engineering & Design, and Management. Undergraduate
    Fri, 21 Jun '19
  • University of Liverpool
    Undergraduate Open Day Undergraduate
    Fri, 21 Jun '19

How did your AQA A-level Chemistry Paper 3 go?

Loved the paper - Feeling positive (274)
31.53%
The paper was reasonable (423)
48.68%
Not feeling great about that exam... (105)
12.08%
It was TERRIBLE (67)
7.71%

Watched Threads

View All