Question

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Answer 1

\(a,n_{Na}=\dfrac{4,6}{23}=0,2\left(mol\right)\)

PTHH: 2Na + 2H₂O ---> 2NaOH + H₂

           0,2--->0,2--------->0,2------->0,1

=> \(\left\{{}\begin{matrix}a,V=0,1.22,4=2,24\left(l\right)\\b,C_{M\left(NaOH\right)}=\dfrac{0,2}{0,5}=0,4M\\c,m_{H_2O}=0,2.18=3,6\left(g\right)\end{matrix}\right.\)

Answer 2

\(n_{Na}=\dfrac{4,6}{23}=0,2mol\)

\(2Na+2H_2O\rightarrow2NaOH+H_2\)

0,2       0,2              0,2          0,1     ( mol )

\(V_{H_2}=0,1.22,4=2,24l\)

\(C_{M_{NaOH}}=\dfrac{0,2}{0,5}=0,4M\)

\(m_{H_2O}=0,2.18=3,6g\)

Answer 3

\(n_{Na}=\dfrac{4,6}{23}=0,2\left(mol\right)\\ pthh:Na+H_2O\rightarrow NaOH+\dfrac{1}{2}H_2\) 
         0,2         0,2             0,2         0,1 
\(V_{H_2}=0,2.22,4=4,48l\\ C_M=\dfrac{0,2}{0,5}=0,4M\\ m_{H_2O}=0,2.18=3,6g\)