\(n_{SO_3}=\dfrac{32}{80}=0.4\left(mol\right)\)
\(m_{H_2SO_4}=200\cdot10\%=20\left(g\right)\)
\(SO_3+H_2O\rightarrow H_2SO_4\)
\(0.4.....................0.4\)
\(m_{dd}=32+200=232\left(g\right)\)
\(C\%H_2SO_4=\dfrac{0.4\cdot98+20}{232}\cdot100\%=25.57\%\)
m H2SO4 = 200.10% = 20(gam)
n SO3 = 32/80 = 0,4(mol)
SO3 + H2O → H2SO4
0,4.......0,4..........0,4........(mol)
Sau phản ứng :
m H2SO4 = 20 + 0,4.98 = 59,2(gam)
m dd = 32 + 200 - 0,4.18 = 224,8(gam)
C% H2SO4 = 59,2/224,8 .100% = 26,33%