Sodium reacts with ethanol to form $C_2H_6ONa $ (sodium ethanolate, soluble in ethanol) and hydrogen (gas). Find formulas not shown leaving aside the charges!
$Na$, $CH_3CH_2ONa$, $H_2$
Find the oxidation numbers (oxidation states OS) - of $Na$ in $Na$ - of $Na$ in $CH_3CH_2ONa$ - of $H$ in $CH_3H_2O$$H$ - of $H$ in $H$$_2$ ?
- OS($Na$ dans $Na) = 0$ - OS($Na$ in $CH_3CH_2ONa$)= +1 - OS($H$ in $CH_3H_2O$$H$) = +1 - OS($H$ in $H$$_2$) = 0
How many electrons are exchanged 1) from $2CH_3CH_2OH$ to $H_2$ 2) from $Na$ to $CH_3CH_2ONa$ ?
1) $+2\;e^-$ (réduction) 2) $-1\;e^-$ (oxydation)
Find the coefficients $x,y,z$ and $p$: $x\;CH_3CH_2OH$ $+$ $y\;Na$ $ \rightarrow $ $z\;H_2$ $ +$ $ p\;CH_3CH_2ONa$
$2\;CH_3CH_2OH$ $+$ $2\;Na$ $\rightarrow $ $1\;H_2$ $ +$ $ 2\;CH_3CH_2ONa$