## What is the chemical equation for the reaction between propa

Discussions on general chemistry and chemical engineering, organic chemistry, analytical chemistry, etc.

### What is the chemical equation for the reaction between propa

What is the chemical equation for the reaction between propanoic acid and sodium?
chikis
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### Re: What is the chemical equation for the reaction between p

I'm no chemist,
but I would be surprised if sodium, in solution, cared about binding to propanoic acid, apart from occasionally substituting for a lost proton at high pH...

neuro
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 Natural ChemE liked this post

### Re: What is the chemical equation for the reaction between p

chikis,

Under what conditions?

It could be a violent reaction if we're talking pure sodium mixed with aqueous propanoic acid:

Or, as neuro said, it could be boring if we're talking sodium cations, ${\text{Na}}^{+}$, mixed with dilute aqueous propanoic acid.
Natural ChemE
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### Re: What is the chemical equation for the reaction between p

Am only asking of the chemical equation.
chikis
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### Re: What is the chemical equation for the reaction between p

chikis,

neuro's answer was correct; I just like the whole alkali-metal-in-water-causes-fireworks thing.

For equations, first propanoic acid would lose its most acidic proton, producing a free proton, ${\text{H}}^{+}$, and propanoate, ${{\text{CH}}_{3}{\text{CH}}_{2}{\text{COO}}}^{-}$. So:
• ${\text{CH}}_{3}{\text{CH}}_{2}{\text{COOH}}{\rightleftharpoons}{{\text{CH}}_{3}{\text{CH}}_{2}{\text{COO}}}^{-}+{\text{H}}^{+}$.
Since propanoate's an anion (negatively charged ion), it's free to associate with an cation (positively charged ion) to produce a salt (cation-anion complex). So:
• ${{\text{CH}}_{3}{\text{CH}}_{2}{\text{COO}}}^{-}+{\text{Na}}^{+}{\rightleftharpoons}\left[{{{\text{CH}}_{3}{\text{CH}}_{2}{\text{COO}}}-{\text{Na}}}\right]$.
As neuro said, there probably wouldn't be much propanoate salt at equilibrium unless the pH was really high (basic solution; not many free protons for the sodium cations to compete with).
Natural ChemE
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### Re: What is the chemical equation for the reaction between p

Are you saying the reaction is not feasible?
chikis
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### Re: What is the chemical equation for the reaction between p

chikis,

The reaction'll happen; just the product won't be favored, like water's dissociation.
Natural ChemE
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### Re: What is the chemical equation for the reaction between p

Sodium propanoate is C3H5NaO2 and Propanoic Acid is C3H6O2, so the organic equation is HC3H5O3 <----> H+ +C3H5O3
redwhitechem
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