P205+H2O->
CaCo3+HCL->
BACL2+H2SO4->
Fe+CuS04->
CU+AgNO3->
Zn+Pв(NO3)2->
FeCl3+KCNS->
BaCl2+K2Cr2O7->
NaOH+NiSO4->
NaOH+CuSO4->

Здравствуйте.Р₂О₅ + 3Н₂О = 2Н₃РО₄CaCO₃ + 2HCl = H₂O + CO₂ + CaCl₂BaCl₂ + H₂SO₄ = BaSO₄ + 2HClFe + CuSO₄(разб.) = FeSO₄ + Cu↓Cu + 2AgNO₃ = Cu(NO₃)₂ + 2AgZn + Pb(NO₃)₂ = Pb + Zn(NO₃)₂3КСNS + FеСl₃ = Fe(CNS)₃ + 3КСlBaCl₂ + K₂Cr₂O₇ = 2KCl + BaCr₂O₇*NiSO₄ + 2NaOH = Ni(OH)₂ + Na₂SO₄2NaOH + CuSO₄  = Na₂SO₄ + Cu(OH)₂