\(n_{Al}=\dfrac{22,4}{27}=\dfrac{112}{135}\left(mol\right)\)
Pt: \(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
\(\dfrac{112}{135}\) ----> \(\dfrac{56}{45}\) ---------> \(\dfrac{56}{135}\) -------> \(\dfrac{56}{45}\)
\(V_{H_2}=\dfrac{56}{45}.22,4=27,87\left(l\right)\)
\(m_{Al_2\left(SO_4\right)_3}=\dfrac{56}{135}.342=141,87\left(g\right)\)
\(m_{H_2SO_4}=\dfrac{56}{45}.98\approx122\left(g\right)\)
\(C\%_{H_2SO_4}=\dfrac{122.100}{300}=40,67\%\)
\(\Sigma_{m_{dd\left(spu\right)}}=22,4+300-\dfrac{56}{45}.2\approx320\left(g\right)\)
\(C\%_{Al_2\left(SO_4\right)_3}=\dfrac{141,87.100}{320}=46,21\%\)