4FeS2+11O2=2Fe2O3+8SO2
n(газа)=17.92/22.4=0.8моль
SO2+2KOH=K2SO3+H2O
V(KOH)=523.4*8/100=41.872мл
m(KOH)=41,872/1,07=39,13г
n(KOH)=39.13/39=1моль
m(K2SO3)=158*0.5=79г
m(раствора)=523.4/1.07+64*0.5=489+32=521г
w(K2SO3)=79/521*100%=15,16%
4FeS2+11O2=2Fe2O3+8SO2
n(газа)=17.92/22.4=0.8моль
SO2+2KOH=K2SO3+H2O
V(KOH)=523.4*8/100=41.872мл
m(KOH)=41,872/1,07=39,13г
n(KOH)=39.13/39=1моль
m(K2SO3)=158*0.5=79г
m(раствора)=523.4/1.07+64*0.5=489+32=521г
w(K2SO3)=79/521*100%=15,16%