Carry out a chain of chemical transformations P – P2O5 – H3PO4 – Na3PO4– Na2CO3 – CaCO3– CO2
| September 16, 2021 | education
1. Combustion of phosphorus in excess of dry oxygen.
P4 + 5O2 = P4O10 (P2O5).
2. Dissolution of phosphorus oxide in water with the formation of phosphoric acid.
P2O5 + 3H2O = 2H3PO4.
3. Reaction of acid neutralization.
H3PO4 + 3NaOH = Na3PO4 + 3H2O.
4. Reaction of exchange.
Na3PO4 + (NH4) 2CO3 = (NH4) 2PO4 + Na2CO3.
5. Reaction of sodium carbonate with calcium chloride.
Na2CO3 + CaCl2 = CaCO3 + 2NaCl.
6. Decomposition of carbonate at a temperature of 900-1000 ° C.
CaCO3 = CaO + CO2.
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