Áp dụng ĐLBTKL, ta có:
\(m_{Zn}+m_{HCl}=m_{ZnCl_2}+m_{H_2}\)
\(\Leftrightarrow3,25+m_{HCl}=6,8+0,1\)
\(\Leftrightarrow m_{HCl}=6,8+0,1-3,25=3,65\left(g\right)\)
Zn + 2HCl -> ZnCl2 + H2
Theo ĐLBTKL
\(m_{Zn}+m_{HCl}=m_{ZnCl_2}+m_{H_2}\\ =>3,25+m_{HCl}=6,8+0,1\\ =>3,25+m_{HCl}=6,9\\ =>m_{HCl}=6,9-3,25=3,65\left(g\right)\)
\(PTHH:Zn+2HCl\rightarrow ZnCl_2+H_2\)
\(áp.dụng.dụng.đlbtkl,ta.có:\\ m_{Zn}+m_{HCl}=m_{ZnCl_2}+m_{H_2}\\ m_{HCl}=m_{ZnCl_2}+m_{H_2}-m_{Zn}=6,8+0,1-3,25=3,65\left(g\right)\)