1) Al + 3OH → Al(OH)3
Al(OH)3 + 3HCl → AlCl3 + 3H2O
AlCl3 (aq) + 3NaOH (aq) → 3NaCl + Al(OH)3
Al(OH)3 + NaOH → Na[Al(OH)4]
2) 4Al + 3O2 → 2Al2O3
Al2O3 + 6HNO3 → 2Al(NO3)3 + 3H2O
Al(NO3)3 + 3NaOH → Al(OH)3 + 3NaNO3
2 Al(OH)3 → Al2O3 + 3 H2O
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Answers & Comments
1) Al + 3OH → Al(OH)3
Al(OH)3 + 3HCl → AlCl3 + 3H2O
AlCl3 (aq) + 3NaOH (aq) → 3NaCl + Al(OH)3
Al(OH)3 + NaOH → Na[Al(OH)4]
2) 4Al + 3O2 → 2Al2O3
Al2O3 + 6HNO3 → 2Al(NO3)3 + 3H2O
Al(NO3)3 + 3NaOH → Al(OH)3 + 3NaNO3
2 Al(OH)3 → Al2O3 + 3 H2O