Gọi KL là M
2M+2xHCl--->2MClx+xH2
n\(H2=\frac{4,48}{22,4}=0,2\left(mol\right)\)
Theo pthh
n\(_M=\frac{2}{x}n_{H2}=\frac{0,4}{x}\left(mol\right)\)
M\(_M=11,2:\frac{0,4}{x}=28x\)
+x=1---->M=28(ko t/m)
+x=2---->M=56(Fe)
Vậy M là Fe
\(\text{M+2Cl → MCl2+H2}\)
\(\text{nH2=4,48:22,4=0,2mol}\)
\(\text{klg muối =11.2:0,2=56}\)
⇒SẮT