1)Cu2+ + HOH = CuOH+ + H+
<span>CuCl2 + HOH = CuOHCl + HCl , среда кислая</span>
1)S+Fe=FeS
2)Fes+2HCl=H2S+FeCl2
3)H2S+3O2=2SO2+2H2O
4)SO2+Na2O=Na2SO3
5)2Na2SO3+O2=2Na2SO4
<span>6)Na2SO4+BaCl2=2NaCl+BaSO4</span>
CuSO4+2NaOH(изб.)=Cu(OH)2(осадок)+Na2SO4
n(CuSO4)=m/M=32/160=0,2моль
n(CuSO4)=n(Cu(OH)2)=0,2моль
m(Cu(OH)2)=n*M=0,2моль*98=19,6г