\(KMnO_4+16HCl\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)
Gọi a là mol Cl2 sinh ra
\(n_{KCl}=n_{MnCl2}=2,5a\left(mol\right)\)
\(\Rightarrow74,5.2,5a+126.2,5a=28,07\)
\(\Rightarrow a=0,056\)
Gọi a, 2a là mol Al, M
\(2Al+3Cl_2\rightarrow2AlCl_3\)
\(2M+nCl_2\rightarrow2MCl_n\)
\(\Rightarrow1,5a+na=0,056\)
\(\Rightarrow a=\frac{0,056}{1,5+n}\left(1\right)\)
\(27a+M.2a=7,5\)
\(\Rightarrow a=\frac{7,5}{27+2M}\left(2\right)\)
\(\left(1\right)+\left(2\right)\Rightarrow\frac{0,056}{1,5+n}=\frac{7,5}{27+2M}\)
\(\Rightarrow7,5\left(1,5+n\right)=0,056.\left(27+2M\right)\)
Không có n thoả mãn M