a, PTHH:
2Al+3H\(_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
n\(_{Al}\)=\(\dfrac{2.7}{27}\)=0.1mol
Từ phươngtrình: n\(_{H_2}\)=32n\(_{Al}\)=32.0,1=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 : \(n_{Al_2\left(SO_4\right)_3}=\dfrac{1}{2}n_{Al}=\dfrac{1}{2}.0,1=0.05mol\)
\(\rightarrow C_{M_{Al_2\left(SO_4\right)_3}}=\dfrac{0.05}{0.075}=0.667M\)
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