Осуществить цепочку превращений:
Na-> Na2O-> NaOH->Na2CO3->Na;
Fe-> FeCl3-> Fe(OH)3-> Fe2O3-> Fe.
Na-> Na2O-> NaOH->Na2CO3->Na;
Fe-> FeCl3-> Fe(OH)3-> Fe2O3-> Fe.
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Answers & Comments
Na2O + H2O = 2NaOH
2NaOH + CO2 = Na2CO3 + H2O
Na2CO3 + 2C = 2Na + 3CO
3Cl2 + 2Fe = 2FeCl3
FeCl3 + 3NaOH = Fe(OH)3↓ + 3NaCl
2Fe(OH)3 = Fe2O3 + 3H2O
Fe2O3 + 3H2 = 2Fe + 3H2O