2 Ca + O2=2CaO
CaO+H2O=Ca(OH)2
Ca(OH)2+Mg(NO3)2=Ca(NO3)2+Mg(OH)2
3Ca(NO3)2+2H3PO4=Ca3(PO4)2+6HNO3
Ca3(PO4)2+3MgSO4=3CaSO4+Mg3(PO4)2
a)H2SO4+CrO= CrSO4+ H2O
б)HNO3+MgO = Mg(NO3)2+H2O
в)2H2Cl+ Ca = CaCl2+ 2H2
г)H2CO3 + K = KCO3 + H2
C2H2+H2=C2H4 (этилен)
C2H4+HOH= C2H5OH (этанол)
2Cu + O2 = 2CuO
CuO + H2SO4 = CuSO4 + H2O
CuSO4 + 2NaOH = Cu(OH)2 + Na2SO4
Cu(OH)2 =t=> CuO + H2O
CuO + H2 = Cu + H2O