1, PTHH: Al + H2SO4 -> Al2(SO4)3 + H2
=V chuột hết pin rồi
\(1,PTHH:2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
\(2,n_{H_2}=\dfrac{m}{M}=\dfrac{0,672}{2}=0,336\left(mol\right)\)
Theo PTHH:
\(n_{Al}=\dfrac{2}{3}.n_{H_2}=\dfrac{2}{3}.0,336=0,224\left(mol\right)\Rightarrow m_{Al}=n.M=0,224.27=6,048\left(g\right)\)
\(n_{H_2SO_4}=n_{H_2}=0,336\left(mol\right)\Rightarrow m_{H_2SO_4}=n.M=0,336.98=32,928\left(g\right)\)
\(n_{Al_2\left(SO_4\right)_3}=\dfrac{1}{3}.n_{H_2}=\dfrac{1}{3}.0,336=0,112\left(mol\right)\Rightarrow m_{Al_2\left(SO_4\right)_3}=n.M=0,112.342=38,304\left(g\right)\)