ПОМОГИТЕ С ХИМИЕЙ!7 класс!Цепочки!
1)HCl--H2--H2O--KOH--K2SO4
2)P--P2O5-H3PO4--Ca3(PO4)2
1)HCl--H2--H2O--KOH--K2SO4
2)P--P2O5-H3PO4--Ca3(PO4)2
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Answers & Comments
2H2 + O2 = 2H2O
H2O + K2O = 2KOH
2KOH + H2SO4 = K2SO4 + 2H2O
2) 4P + 5O2 = 2P2O5
P2O5 + 3H2O = 2H3PO4
2H3PO4 + 3Ca(OH)2 = Ca3(PO4)2 + 6H2O