4FeS2 + 15 О2 + 8 H2O = 8H2SO4 + 2Fe2O3
m(H2SO4)т = 12*8*98/4*(56+64) = 19,6 кг
W = 14.7*100/19.6 = 75 %
Н2SO4+Na2SO3=Na2SO4+SO2+H2O
Н2SO4+Ba(NO3)2=BaSO4+2HNO3
HNO3+KOH=KNO3+H2O
KOH=K(+1)+OH(-1)
Na2So4=2Na(+1)+SO4(-2)
K3PO4=3K(+1)+PO4(-3)
FeCl3 =Fe(+3)+3Cl(-1)
HNO3 =H(+1)+NO3(-1)
Ag3PO4=3Ag(+1)+PO4(-3)