(1) \(C{a_3}{(P{O_4})_2} + 3Si{O_2} + 5C\xrightarrow{{{{1200}^0}C}}2P + 3CaSi{O_3} + 5CO\)
X là P
(2) \(2P + 3Ca\xrightarrow{{{t^0}}}C{a_3}{P_2}\)
Y là \(C{a_3}{P_2}\)
(3) \(C{a_3}{P_2} + 6HCl \to 3CaC{l_2} + 2P{H_3}\)
(4) \(2P{H_3} + 4{O_2}\xrightarrow{{{t^0}}}{P_2}{O_5} + 3{H_2}O\)
Z là \({P_2}{O_5}\)
