Осуществите превращения:
P →Mg3P2 → PH3 → P2O5 →H3PO4 – Ca3(PO4)2 .
3Mg+2P=Mg3P2
Mg3P2+6HCl=3MgCl2+2PH3
2PH3+4O2=P2O5+3H2O
P2O5+3H2O=2H3PO4
2H3PO4+3Ca(OH)2=Ca3(PO4)2+6H2O
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Answers & Comments
3Mg+2P=Mg3P2
Mg3P2+6HCl=3MgCl2+2PH3
2PH3+4O2=P2O5+3H2O
P2O5+3H2O=2H3PO4
2H3PO4+3Ca(OH)2=Ca3(PO4)2+6H2O