a, \(MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O\)
Ta có:
\(n_{MnO2}=\frac{4,35}{87}=0,05\left(mol\right)\)
\(n_{HCl}=0,3.1=0,3\left(mol\right)\)
\(n_{Cl2}=n_{MnO2}=0,05\left(mol\right)\)
\(\Rightarrow V_{Cl2}=0,05.22,4=1,12\left(l\right)\)
b,\(MnCl_2+2AgNO_3\rightarrow2AgCl+Mn\left(NO_3\right)_2\)
\(HCl+AgNO_3\rightarrow AgCl+HNO_3\)
\(n_{MnCl2}=n_{MnO2}=0,05\left(mol\right)\)
\(n_{HCl.trong.X}=0,3-0,2=0,1\left(mol\right)\)
\(n_{AgCl}=0,05.2+0,1=0,2\left(mol\right)\)
\(\Rightarrow m_{AgCl}=0,2.143,5=28,7\left(g\right)\)