Citric acid + sodium hydroxide reversible of irreversible?

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2007PSanHa
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Is the reaction between Citric acid + sodium hydroxide reversible of irreversible? Anyone know? Thanks!
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charco
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(Original post by 2007PSanHa)
Is the reaction between Citric acid + sodium hydroxide reversible of irreversible? Anyone know? Thanks!
It's a neutralisation reaction. It is not reversible.
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2007PSanHa
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Thanks, I had a feeling! It's just that I read somewhere that the equilibrium is nearly all the way over to one side so wasn't sure!
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charco
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(Original post by 2007PSanHa)
Thanks, I had a feeling! It's just that I read somewhere that the equilibrium is nearly all the way over to one side so wasn't sure!
For weak acids on their own that would be the case, but the hydroxide ions react with the available hydrogen ions from the acid pulling the weak acid equilibrium to the side of the product ions. Water is formed in the process (neutralisation).
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2007PSanHa
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Oh OK, thanks!
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Pigster
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If you had some citric acid and added NaOH, you'd make sodium citrate and water.

If you added hydrochloric acid to that to a slightly acidic pH, then evaporated it what would cystalise out?
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