1)
Cp=8%
mr=250g
ms=Cp*mr/100%
ms=8*250/100
ms = 20g H2SO4
2)
10g 98%.......................2 - 0 = 2
.......................2%
xg 0%..........................98 - 2 = 96
10/x = 2/96
2x = 960
x = 480g wody
3)
kwas siarkowy(IV)
mH2SO3=32u+50u=82u
%S = (32/82)*100% = 39%
kwas siarkowy(VI)
mH2SO4=32u+66u=98u
%S = (32/98)*100% = 32,6%