IGCSE Chemistry Revision - 24 - Extraction of Aluminium

[@SimpleScienceProductions]

I'm very very sorry for saying "Aluminium Hydroxide" instead of "Aluminium Oxide" multiple times in the 3. Formation slide at 5:23, so beware of my mistake. However, THE SLIDES ARE CORRECT. Please forgive me 3: - Nhan

[@gomugomutree6075]

Mr. Simple Science, i think in the Formation slide at 5:23, in the chemical equation, the Al(OH)3 should be 2Al(OH)3

[@abdulmoeed5638]

@@gomugomutree6075 yes u r right

[@djsdir207]

@@abdulmoeed5638 yep

[@djsdir207]

aslo at 8:02 you said cathode instead of anode

[@millie1414]

Hope this helps this is basically a summary of what goes on in the extraction of aluminium from the bauxite. Xx
1. Aluminium oxide is dissolved in molten cryolite
2. Graphite casing inside metal casing (cathode)
3. Aluminum (Al^+3) attracted to the negative cathode and gains electrons Al^+3 +3e ---> Al (reduction)
5. Aluminium sinks because it's more dense.
6. Oxygen forms at the anode
7. Carbon also forms there making CO2
Overall in the electrolyte:
2Al2O3--->4Al+3O2

[@nouraattia452]

Thanks

[@annymus4502]

Thanks

[@bactayyt5013]

thxs

[@deborahhackman9820]

Thanks

[@ayaalmanfud3207]

During oxidation at 8:12 wouldn't oxygen require 4 electrons since its diatomic?

[@cookiesandcream3953]

At 8:06 you said that at the cathode the Oxygen ions will be oxidized? But doesn't oxidation take place at anode??

[@mariahassan3875]

you also said cathode instead of anode at 8:02

[@sarwarn2107]

I don't think in industrial process they do purification process (steps 1, 2 and 3). The aluminium oxide is already exist in the raw mineral. The steps 1, 2 and 3 add more cost to the process especially the heating process in step 3.

[@mwanahamishassan1890]

Sarwar Nezar
Okay thank you

[@rishikesav4437]

Buddy,,@5.07 it is said as sodium hydroxide while it really is aluminium hydroxide

[@orielbaptista6514]

why is sodium hydroxide used?

[@jamiiforamhezron7814]

NaOH is used so as to form a soluble complex compound

[@SabrinaXe]

Because sodium hydroxide is a base so the aluminum oxide which is an amphoteric, reacts or dissolves in the sodium hydroxide forming sodium aluminate(NaAlO2). The impurity which is iron oxide, is a basic oxide so it won't react or dissolve in sodium hydroxide since they're both bases so iron oxide will remain as a solid. As for sand(silicon dioxide) it is an acidic oxide BUT it is too unreactive

[@SabrinaXe]

To sum it up, sodium hydroxide is used to remove the impurities such as sand and iron oxide present in the bauxite ore

[@BenitaOFlade]

NaAl(OH)4 is called Sodium aluminate(lll).

[@MaryamXasan-k1o]

Thanks teacher 😊

[@yussufpepe6767]

U r the best

[@mariamhaddad7605]

Is this both tha Bayer and Hall-Herault process?

[@ammitante]

yay! new upload!!!! :D

[@xenguyen9616]

oh nice

[@haishrheenarheena3795]

Nice work. Tq

[@sajidsajan631]

Hiii awesome heating betwn O2 and al

[@immanuelimms1037]

Thanks sir ,I know understand

[@rollzfn7958]

Thx

[@toph8949]

It's really good its just that you keep touching your mic with your lip and it changes the volume of your voice,so please try not to do that in the next video, thanks

[@gullafshan6040]

The vedio was well prepared but the subtitles didn't let me read the equations below them ....so plz don't add subtitles or make another way for subtitles so that we may read the equations as well

[@gomugomutree6075]

dude just turn off the subtitles

[@gullafshan6040]

@@gomugomutree6075 I really didn't know that it could be possible...but thanks for this info

[@alvira7640]

thankyouuu

[@jamiiforamhezron7814]

Thanks

[@chidoziegodwin1626]

thanks so much..

[@cindylo8505]

First!!!

[@SimpleScienceProductions]

yay!

[@danielrominov4037]

wow this was very helpful, can you make a video on the Dow process (preparation of Magnesium).

[@benshapiroslawnmower1084]

yo thx dude

[@alikamallik9690]

Not cool

[@yussufpepe6767]

Thank u

[@bharatsonawane8554]

Kitha boot karte hi bhai, Kuch nhi dimag me ghusa . Bhai electrolysis last me hota hai, tune pehela he kar diya

[@twaambomweemba4983]

Dss