\(n_{Zn}=\dfrac{13}{65}=0,2mol\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
0,2 0,4 0,2 ( mol )
\(m_{HCl}=0,4.36,5=14,6g\)
\(m_{ddHCl}=\dfrac{14,6\times100}{14,6}=100g\)
\(m_{ddspứ}=100+13=113g\)
\(m_{ZnCl_2}=0,2.136=27,2g\)
\(C\%_{ZnCl_2}=\dfrac{27,2}{113}.100=24,07\%\)