$a,PTPƯ:2Al+6HCl\xrightarrow{} 2AlCl_3+3H_2↑$
$n_{H_2}=\dfrac{1,12}{22,4}=0,05mol.$
$Theo$ $pt:$ $n_{AlCl_3}=\dfrac{2}{3}n_{H_2}=\dfrac{1}{30}mol.$
$⇒m_{AlCl_3}=\dfrac{1}{30}.133,5=4,45g.$
$b,Theo$ $pt:$ $n_{Al}=\dfrac{2}{3}n_{H_2}=\dfrac{1}{30}mol.$
$⇒m_{Al}=\dfrac{1}{30}.27=0,9g.$
$Theo$ $pt:$ $n_{HCl}=2n_{H_2}=0,1mol.$
$⇒m_{HCl}=0,1.36,5=3,65g.$
$c,m_{ddHCl}=\dfrac{3,65}{10\%}=36,5g.$
$d,m_{ddAlCl_3}=m_{Al}+m_{ddHCl}-m_{H_2}$
$⇒m_{ddAlCl_3}=0,9+36,5-0,05.2=37,3g.$
$⇒C\%_{ddAlCl_3}=\dfrac{4,45}{37,3}.100\%=11,93\%$
$e,PTPƯ:2Al+3H_2SO_4\xrightarrow{} Al_2(SO_4)_3+3H_2↑$
$Theo$ $pt:$ $n_{H_2SO_4}=n_{H_2}=0,05mol.$
$⇒m_{H_2SO_4}=0,05.98=4,9g.$
$⇒m_{ddH_2SO_4}=\dfrac{4,9}{10\%}=49g.$
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