mdd H2SO4 = 1,12 . 500 = 560 (g)
mH2SO4 = \(\dfrac{17\times560}{100}=95,2\left(g\right)\)
=> mH2O = 560 - 95,2 = 464,8 (g)
=> nH2O = \(\dfrac{464,8}{18}=25,82\left(mol\right)\)
nSO3 = \(\dfrac{100}{80}=1,25\left(mol\right)\)
=> H2O dư
Pt: SO3 + H2O --> H2SO4
1,25 mol----------> 1,25 mol
mH2SO4 = 1,25 . 98 = 122,5 (g)
mH2SO4 sau khi trộn = 122,5 + 95,2 = 217,7 (g)
mdd = 560 + 100 = 660 (g)
C% = \(\dfrac{217,7}{660}.100\%=33\%\)