Cho sơ đồ sau: P \(\xrightarrow{+Ca,{{t}^{o}}}\) X \(\xrightarrow{+{{H}_{2}}O}\) khí Y \(\xrightarrow{+{{O}_{2}},{{t}^{o}}}\) H3PO4 \(\xrightarrow{+Ca{{(OH)}_{2}}dư}\)M. Vậy X, Y,...

* Hướng dẫn giải

2P + 3Ca \(\xrightarrow{{{t}^{o}}}\) Ca₃P₂

                             (X)

Ca₃P₂ + 6H₂O → 3Ca(OH)₂ + 2PH₃

                                                   (Y)

PH₃ + 2O₂ \(\xrightarrow{{{t}^{o}}}\) H₃PO₄

2H₃PO₄ + 3Ca(OH)₂ → Ca₃(PO₄)₂ + 6H₂O

Đáp án B