PTHH:
2Al 3H\(_2SO_4\rightarrow Al_2\left(SO_4\right)_ 3 3H_2\)
n\(_{Al}\)=\(\dfrac{2.7}{27}\)=0,1mol
Từ phương trình: n\(_{H_2}\)=3/2n\(_{Al}\)=3/2.0,1=0.15mol
-> V\(_{H_2}\)=22,4.0,15=3.36 l
b, Từ phương trình :\(n_{H_2SO_4}=\dfrac{3}{2}n_{Al}=\dfrac{3}{2}.0,1=0.15mol\)
\(\rightarrow V_{H_2SO_4}=\dfrac{0.15}{2}=0.075l\)
\(\rightarrow V_{saupu}=V_{H_2SO_4}=0.075l\)
\(\rightarrow C_{M_{H_2}}=\dfrac{0.15}{0.075}=2M\)
Từ phương trình : \(n_{Al_2\left(SO_4\right)_3}=\dfrac{1}{2}n_{Al}=\dfrac{1}{2}.0,1=0.05mol\)
\(\rightarrow C_{M_{Al_2\left(SO_4\right)_3}}=\dfrac{0.05}{0.075}=0.667M\)