Gọi \(\left\{{}\begin{matrix}n_{Fe}=x\left(mol\right)\\n_{Ca}=y\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow56x+40y=10,4\left(1\right)\)
\(n_{HCl}=\dfrac{25,55}{36,5}=0,7mol\)
\(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\)
\(Ca+2HCl\rightarrow CaCl_2+H_2\uparrow\)
\(\Rightarrow2x+2y=0,7\left(2\right)\)
Tư (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}x=-0,225mol\\y=0,575mol\end{matrix}\right.\)
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