a) 2Na+2H2O--->2NaOH+H2
n\(_{Na}=\frac{13,8}{23}=0,6\left(mol\right)\)
Theo pthh
n\(_{H2}=\frac{1}{2}n_{Na}=0,3\left(mol\right)\)
V\(_{H2}=0,3.22,4=6,72\left(l\right)\)
b) Theo pthh
n\(_{NaOH}=n_{Na}=0,6\left(mol\right)\)
m\(_{NaOH}=0,6.40=24\left(g\right)\)
c) C\(_{M\left(NaOH\right)}=\frac{0,6}{0,1}=6\left(M\right)\)
\(\text{Na + H2O -> NaOH + 1/2H2}\)
\(\text{a) Ta có: n Na=13,8/23=0,6 mol}\)
Theo ptpu: nH2=1/2 nNa=0,3 mol
\(\Rightarrow\text{ V H2=0,3.22,4=6,72 lít}\)
b) Theo ptpu: nNaOH=nNa=0,6 mol
\(\Rightarrow\text{mNaOH=0,6.40=24 gam}\)
\(\text{c) Ta có V dung dịch sau phản ứng=100 ml =0,1 lít}\)
\(\Rightarrow\text{CM NaOH =nNaOH/V dung dịch=0,6/0,1=6M}\)