a,
\(NaCl+H_2SO_4\rightarrow NaHSO_4+HCl\)
x__________________________ x
\(KCl+H_2SO_4\rightarrow KHSO_4+HCl\)
y__________________________y
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
____ 0,4______________0,2
\(n_{H2}=0,2\left(mol\right)\)
Giải hệ PT:\(\left\{{}\begin{matrix}58,5x+74,5y=26,6\\x+y=0,4\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}x=0,2\\y=0,2\end{matrix}\right.\)
\(\Rightarrow\%_{NaCl}=\frac{0,2.58,5}{26,6}.100\%=43,98\%\)
\(\Rightarrow\%_{KCl}=100\%-43,98\%=56,01\%\)
b,
\(n_{Cl^-}=n_{NaCl}+n_{KCl}=0,4\left(mol\right)\)
\(2Cl^{-1}\rightarrow Cl_2+2e\)
0,4_______0,2______
\(\Rightarrow V_{Cl2}=0,2.22,4=44,8\left(l\right)\)
