2Na + 2H2O → 2NaOH + H2↑
\(n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Theo PT: \(n_{NaOH}=2n_{H_2}=2\times0,2=0,4\left(mol\right)\)
\(\Rightarrow x=m_{NaOH}=0,4\times40=16\left(g\right)\)
PTHH: 2Na + 2H2O → 2NaOH + H2↑
................2..........2................2...........1 (mol)
...............0,4.......0,4.............0,4.........0,2 (mol)
nH2 = \(\dfrac{V}{22,4}\) = \(\dfrac{4,48}{22,4}\) = 0,2 (mol)
Ta có: mNaOH = n . M = 0,4 . 40 = 16 (g)
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