## Question

###### Write a net ionic equation for the overall reaction that occurs when aqueous solutions of...

Write a net ionic equation for the overall reaction that occurs when aqueous solutions of carbonic acid and sodium hydroxide are combined. Assume excess base.

## Answers

H+ [from carbonic acid] + OH-[from base] ----->H2O(l)

Molecular equation:

2 NaOH(aq) + H2CO3(aq) => Na2CO3(aq) + 2 H2O(l)

Complete ionic equation (expand strong electrolytes into ions):

2 Na+(aq) + 2 OH-(aq) + H2CO3(aq)

=> 2 Na+(aq) + CO3

^{2-}(aq) + 2 H2O(l)Net ionic equation (cancel common ions in complete ionic equation):

2 OH-(aq) + H2CO3(aq) => CO3

^{2-}(aq) + 2 H2O(l)

H+ [from H2CO3] + OH- [ base] ----->H2O

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