Write the reaction equations: Aluminum – Aluminum chloride – Aluminum hydroxide – Sodium aluminate – Nitrate

1) 2Al + 6HCl → 2AlCl3 + 3H2 (substitution reaction; aluminum, hydrochloric acid, aluminum chloride, hydrogen);

2) AlCl3 + 3NaOH → 3NaCl + Al (OH) 3 ↓ (exchange reaction; aluminum chloride, sodium hydroxide, sodium chloride, aluminum hydroxide);

3) Al (OH) 3 ↓ + NaOH → NaAlO2 + 2H2O (exchange reaction; aluminum hydroxide, sodium hydroxide, sodium aluminate, water);

4) NaAlO2 + 4HNO3 → NaNO3 + Al (NO3) 3 + 2H2O (exchange reaction; sodium aluminate, nitric acid, sodium nitrate, aluminum nitrate, water).

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