Write the reaction equation: Cr- Cr2O3- CrCl3- Cr (OH) 3 – Cr2O3- Cr
| September 7, 2021 | education
Let’s write down the reaction equations.
Cr -> Cr2O3 -> CrClC3 -> Cr (OH) 3 -> Cr2O3 -> Cr.
1. Combustion reaction.
4Cr + 3O2 = 2Cr2O3.
As a result, chromium oxide is formed.
2. The reaction is called an exchange reaction.
Cr2O3 + 6HCl = 2CrCl3 + 3H2O.
When chromium oxide interacts with hydrochloric acid, chromium chloride and water are formed as a result.
3. Reaction of exchange.
CrCl3 + 3NaOH = Cr (OH) 3 + 3NaCl.
Compounds of chromium hydroxide and sodium nitrate are formed.
4. Decomposition reaction.
2Cr (OH) 3 = Cr2O3 + 3H2O.
Chromium oxide compounds and water are formed.
5. Substitution reaction.
Cr2O3 + 3H2 = 2Cr + 3H2O.
Chromium and water are formed.
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