So far we have learned about about single displacement, double displacement, gas evolving, neutralization, synthesis, disassociation, and combustion.

I was trying to solve the following chemical equation and I couldn't figure out under what category this reaction falls.

*Aqueous lithium hydroxide reacts with gaseous carbon dioxide to produce aqueous lithium hydrogen carbonate.

$$\ce{LiOH(aq) + CO2(g) -> LiHCO3(aq)}$$

If this is a synthesis, how can the base combine with $\ce{CO2}$?

  • $\begingroup$ @santimirandarp Of course, you could have edit this yourself. $\endgroup$
    – Mithoron
    Apr 16, 2017 at 19:38
  • 1
    $\begingroup$ Chemical reactions don't really have types. $\endgroup$ Apr 16, 2017 at 21:39

2 Answers 2


There are many ways of describing this reaction, but the word that comes to mind is addition, because $\ce{OH^-}$ adds to $\ce{CO_2}$.


Lewis theory would suggest it to be an acid-base: CO2 behaves as electron pair acceptor from OH-

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However, it is not compulsory to classify a reaction into just one type: The given reaction could also be called synthesis, as simpler molecules combine to give a more complex one.


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