(CH3COO)2Pb + 2H2O = 2CH3COOH + Pb(OH)2
2C2H5OH = C4H6 + 2 H2O +H2 сумма коэффициентов -6
4P+5O2=2P2O5
P2O5+3H2O=2H3PO4
H3PO4+3NaOH=Na3PO4+3H2O
2Na3PO4+3CaCl2=Ca3(PO4)2+6NaCl
3Ca+2P=Ca3P2
Ca3P2+6HCl=3CaCl2+2PH3
2PH3+4O2=P2O5+3H2O
P2O5+6KOH=3K3PO4+3H2O
2K3PO4+3CaCl2=Ca3(PO4)2+6KCL
Ca3(PO4)2<span> + </span>2H2<span>SO4 = </span>Ca(H2PO4)2<span> + </span>2<span>CaSO4</span>