\(Na+HCl->NaCl+\dfrac{1}{2}H_2\\ Na+H_2O->NaOH+\dfrac{1}{2}H_2\\ Dễ.thấy:n_{Na}=2n_{H_2}=2\cdot\dfrac{4,48}{22,4}=0,4mol\\ m=0,4.23=9,2g\)
\(n_{HCl}=1.0,2=0,2\left(mol\right)\)
\(n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Do \(n_{H_2}=n_{HCl}\) nên Na dư
\(Na+2HCl\rightarrow NaCl+H_2\)
0,1 <--0,2 ----------------> 0,1
\(2Na+2H_2O\rightarrow2NaOH+H_2\)
0,2 <------------------------------ 0,1
Từ pthh suy ra \(n_{Na}=0,3\left(mol\right)\)
\(m=0,3.23=\)\(6,9\left(g\right)\)