\(n_{H_2}=\frac{V_{H_2}}{224,}=\frac{1,68}{22,4}=0,075\left(mol\right)\)
-> \(m_{H_2}=n_{H_2}.M_{H_2}=0,075.2=0,15\left(g\right)\)
Mà \(n_{\left(H\right)}=2n_{H_2}\)
-> \(n_{\left(H\right)}=2n_{H_2}=2.0,075=0,15\left(mol\right)\)
-> \(n_{HCl}=n_{\left(H\right)}=0,15\left(mol\right)\)
-> \(m_{HCl}=n_{HCl}.M_{HCl}=0,15.\left(1+35,5\right)=5,475\left(g\right)\)
- Áp dụng định luật bảo toàn khối lượng .
\(m_{hh}+m_{HCl}=m_{H_2}\) + mMuối khan
=> mMuối khan = \(m_{hh}+m_{HCl}-m_{H_2}=2,17+5,475-0,15\)
=> mMuối khan = 7,495 ( g )
\(n_{H_2}=\frac{1,68}{22,4}=0,075\left(mol\right)\)
\(m_{H_2}=0,075.2=0,15\left(g\right)\)
\(n_{HCl}=2.n_{H_2}=2.0,075=0,15\left(mol\right)\)
\(m_{HCl}=0,15.36,5=5,475\left(g\right)\)
Theo DDLBTKL thì:
\(m_{muối}=2,17+5,475-0,15=7,495\left(g\right)\)
Chúc bạn học tốt