a, \(n_{H_2SO_4}=0,45.0,2=0,09\left(mol\right)\)
PTHH: FeO + H2SO4 → FeSO4 + H2O
Mol: a a
PTHH: MgO + H2SO4 → MgSO4 + H2O
Mol: b b
Ta có: \(\left\{{}\begin{matrix}72a+40b=4,48\\a+b=0,09\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=0,0275\\b=0,0625\end{matrix}\right.\)
\(\%m_{FeO}=\dfrac{0,0275.72.100\%}{4,48}=44,196\%\)
\(\%m_{MgO}=100-44,196=55,804\%\)
b,
PTHH: FeO + H2SO4 → FeSO4 + H2O
Mol: 0,0275 0,0275
PTHH: MgO + H2SO4 → MgSO4 + H2O
Mol: 0,0625 0,0625
\(C_{M_{ddFeSO_4}}=\dfrac{0,0275}{0,2}=0,1375M\)
\(C_{M_{ddMgSO_4}}=\dfrac{0,0625}{0,2}=0,3125M\)