\(n_{H_2SO_4}=\dfrac{m_{dd}.C\%}{100\%.M}=\dfrac{300.19,6\%}{100\%.98}=0,6\left(mol\right)\)
a) PTHH: \(H_2SO_4+BaCl_2\rightarrow BaSO_4\downarrow+2HCl\)
1 1 1 2
0,6 0,6 0,6 1,2
b) \(m_{BaSO_4}=n.M=0,6.233=139,8\left(g\right)\)
c) \(m_{ddBaCl_2}=\dfrac{m_{BaCl_2}.100\%}{C\%}=\dfrac{0,6.208.100\%}{25\%}=499,2\left(g\right)\)
d) \(C\%_{BaSO_4}=\dfrac{m_{ct}}{m_{dd}}.100\%=\dfrac{139.8}{300+124,8}.100\%=32,9\%\)