Question 2Extraction of Aluminium Step 1 : Dressing of the ore chemical method Baeyer's process - Step 1, Step 2, Step 3 14. Bauxite to - sodium aluminateAl2O3.2H2O+NaOH→150−200°C...............+............... ext{Al}_2 ext{O}_3.2 ext{H}_2 ext{O} + ext{NaOH} \xrightarrow{150-200 \degree ext{C}} ............... + ...............Al2O3.2H2O+NaOH150−200°C...............+...............15. Sodium aluminate to - aluminium hydroxideNaAlO2+H2O→50−60°C...............+...............↓ ext{NaAlO}_2 + ext{H}_2 ext{O} \xrightarrow{50-60 \degree ext{C}} ............... + ............... \downarrowNaAlO2+H2O50−60°C...............+...............↓16. Aluminium hydroxide to pure aluminaAl(OH)3→1100°C...............+............... ext{Al(OH)}_3 \xrightarrow{1100 \degree ext{C}} ............... + ...............Al(OH)31100°C...............+...............Step 2: Conversion of conc. ore to its oxide Step not necessary since the ore is already an oxide Step 3: Reduction of metallic oxide to its metal Hall Heroult's Process - Reduction by electrolysis 17. Electrolytic reduction of pure aluminaAl2O3 ⇌ ............... + ...............18. At cathode2Al3+ + 6e- ⟶ ...............19. At anode3O2- - 6e- ⟶ 3[...............] ⟶ 3O2Step 4: Electrorefining of aluminium [reference]

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Question 2Extraction of Aluminium Step 1 : Dressing of the ore chemical method Baeyer's process - Step 1, Step 2, Step 3 14. Bauxite to - sodium aluminateAl2O3.2H2O+NaOH→150−200°C...............+...............	ext{Al}_2	ext{O}_3.2	ext{H}_2	ext{O} + 	ext{NaOH} \xrightarrow{150-200 \degree	ext{C}} ............... + ...............Al2​O3​.2H2​O+NaOH150−200°C​...............+...............15. Sodium aluminate to - aluminium hydroxideNaAlO2+H2O→50−60°C...............+...............↓	ext{NaAlO}_2 + 	ext{H}_2	ext{O} \xrightarrow{50-60 \degree	ext{C}} ............... + ............... \downarrowNaAlO2​+H2​O50−60°C​...............+...............↓16. Aluminium hydroxide to pure aluminaAl(OH)3→1100°C...............+...............	ext{Al(OH)}_3 \xrightarrow{1100 \degree	ext{C}} ............... + ...............Al(OH)3​1100°C​...............+...............Step 2: Conversion of conc. ore to its oxide   Step not necessary since the ore is already an oxide   Step 3: Reduction of metallic oxide to its metal   Hall Heroult's Process - Reduction by electrolysis   17. Electrolytic reduction of pure aluminaAl2O3 ⇌ ............... + ...............18. At cathode2Al3+ + 6e- ⟶ ...............19. At anode3O2- - 6e- ⟶ 3[...............] ⟶ 3O2Step 4: Electrorefining of aluminium [reference]

Accepted Answer

Extraction of Aluminium Step 1 : Dressing of the ore chemical method Baeyer's process - Step 1, Step 2, Step 3 14. Bauxite to - sodium aluminateAl2O3.2H2O+2NaOH→150−200°C2NaAlO2+3H2O	ext{Al}_2	ext{O}_3.2	ext{H}_2	ext{O} + 	ext{2NaOH} \xrightarrow{150-200 \degree	ext{C}} \bold{2NaAlO}_\bold{2} + \bold{3H}_\bold{2}\bold{{O}}Al2​O3​.2H2​O+2NaOH150−200°C​2NaAlO2​+3H2​O15. Sodium aluminate to - aluminium hydroxideNaAlO2+2H2O→50−60°CNaOH+Al(OH)3↓	ext{NaAlO}_2 + 	ext{2H}_2	ext{O} \xrightarrow{50-60 \degree	ext{C}} \bold{NaOH} + \bold{Al(OH)}_\bold{3}\downarrowNaAlO2​+2H2​O50−60°C​NaOH+Al(OH)3​↓16. Aluminium hydroxide to pure alumina2Al(OH)3→1100°CAl2O3+3H2O	ext{2Al(OH)}_3 \xrightarrow{1100 \degree	ext{C}} \bold{Al}_\bold{2}\bold{O}_\bold{3} + \bold{3H}_\bold{2}\bold{{O}}2Al(OH)3​1100°C​Al2​O3​+3H2​OStep 2: Conversion of conc. ore to its oxide   Step not necessary since the ore is already an oxide   Step 3: Reduction of metallic oxide to its metal   Hall Heroult's Process - Reduction by electrolysis   17. Electrolytic reduction of - pure aluminaAl2O3 ⇌ 2Al3+ + 3O2-18. At cathode2Al3+ + 6e- ⟶ 2Al19. At anode3O2- - 6e- ⟶ 3[O] ⟶ 3O2Step 4: Electrorefining of aluminium [reference]

Extraction of Aluminium
Step 1 : Dressing of the ore chemical method
Baeyer's process - Step 1, Step 2, Step 3
14. Bauxite to - sodium aluminate	$\text{Al}_2\text{O}_3.2\text{H}_2\text{O} + \text{NaOH} \xrightarrow{150-200 \degree\text{C}} ............... + ...............$
15. Sodium aluminate to - aluminium hydroxide	$\text{NaAlO}_2 + \text{H}_2\text{O} \xrightarrow{50-60 \degree\text{C}} ............... + ............... \downarrow$
16. Aluminium hydroxide to pure alumina	$\text{Al(OH)}_3 \xrightarrow{1100 \degree\text{C}} ............... + ...............$
Step 2: Conversion of conc. ore to its oxide
Step not necessary since the ore is already an oxide
Step 3: Reduction of metallic oxide to its metal
Hall Heroult's Process - Reduction by electrolysis
17. Electrolytic reduction of pure alumina	Al₂O₃ ⇌ ............... + ...............
18. At cathode	2Al³⁺ + 6e^- ⟶ ...............
19. At anode	3O^2- - 6e^- ⟶ 3[...............] ⟶ 3O₂
Step 4: Electrorefining of aluminium [reference]

Extraction of Aluminium
Step 1 : Dressing of the ore chemical method
Baeyer's process - Step 1, Step 2, Step 3
14. Bauxite to - sodium aluminate	$\text{Al}_2\text{O}_3.2\text{H}_2\text{O} + \text{2NaOH} \xrightarrow{150-200 \degree\text{C}} \bold{2NaAlO}_\bold{2} + \bold{3H}_\bold{2}\bold{{O}}$
15. Sodium aluminate to - aluminium hydroxide	$\text{NaAlO}_2 + \text{2H}_2\text{O} \xrightarrow{50-60 \degree\text{C}} \bold{NaOH} + \bold{Al(OH)}_\bold{3}\downarrow$
16. Aluminium hydroxide to pure alumina	$\text{2Al(OH)}_3 \xrightarrow{1100 \degree\text{C}} \bold{Al}_\bold{2}\bold{O}_\bold{3} + \bold{3H}_\bold{2}\bold{{O}}$
Step 2: Conversion of conc. ore to its oxide
Step not necessary since the ore is already an oxide
Step 3: Reduction of metallic oxide to its metal
Hall Heroult's Process - Reduction by electrolysis
17. Electrolytic reduction of - pure alumina	Al₂O₃ ⇌ *2Al³⁺* + *3O^2-*
18. At cathode	2Al³⁺ + 6e^- ⟶ *2Al*
19. At anode	3O^2- - 6e^- ⟶ 3[O] ⟶ 3O₂
Step 4: Electrorefining of aluminium [reference]

Metallurgy — Question 2

Question 2