Zn+2HCl\(\rightarrow\)ZnCl2+H2
\(n_{Zn}=n_{H_2}=\dfrac{11,2}{22,4}=0,5mol\)
\(n_{HCl}=2n_{H_2}=2.0,5=1mol\)
mZn=0,5.65=32,5g
\(C_{M_{HCl}}=\dfrac{n}{v}=\dfrac{1}{0,5}=2M\)
nMg=4,8:24=0,2mol
Mg+2HCl\(\rightarrow\)MgCl2+H2
\(\dfrac{0,2}{1}< \dfrac{1}{2}\)\(\rightarrow\)Mg hết, HCl dư
\(n_{HCl\left(pu\right)}=2n_{Mg}=2.0,2=0,4mol\)
\(n_{HCl\left(dư\right)}=1-0,4=0,6mol\)
\(m_{HCl\left(dư\right)}=0,6.36,5=21,9g\)