\(n_{H_2SO_4}=\dfrac{100.1,14.20\%}{98}=0,233\left(mol\right)\)
\(n_{BaCl_2}=\dfrac{5,2\%.400}{108}=0,1\left(mol\right)\)
\(H_2SO_4+BaCl_2\rightarrow BaSO_4+2HCl\)
0,233..........0,1
Lập tỉ lệ : \(\dfrac{0,233}{1}>\dfrac{0,1}{1}\) => H2SO4 dư
\(m_{BaSO_4}=0,1.233=23,3\left(g\right)\)