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lionkeepo
@lionkeepo
July 2022
1
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ПОМОГИТЕ СРОЧНО!!!
составьте уравнения реакций
P → P2O5 → H3PO4 → Na3PO4 → H3PO4.
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maschulya1549
Примерно так: 1) 4P + 5O2 = 2P2O5 2) P2O5 + 3H2O = 2H3PO4 3) H3PO4 + 3NaOH = 3H2O + Na3PO4 4) 2Na3PO4 + 3CaCl2 = 6NaCl + Ca3(PO4)2
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lionkeepo
В последней реакции нужно добавить серную кислоту
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