3H2SO3+K2Cr2O7+H2SO4=K2SO4+Cr2(SO4)3+4H2O
m(SO2)=50x0.04x1.022=2.044г
v(K2Cr2O7)=2.044/64/3=0.01065моль
V(K2Cr2O7)=0.01065/0.2x1000=53.25мл
3H2SO3+K2Cr2O7+H2SO4=K2SO4+Cr2(SO4)3+4H2O
m(SO2)=50x0.04x1.022=2.044г
v(K2Cr2O7)=2.044/64/3=0.01065моль
V(K2Cr2O7)=0.01065/0.2x1000=53.25мл