Ionic equation

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Lorena Zhang 4E
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Joined: Fri Sep 28, 2018 12:16 am

Ionic equation

Postby Lorena Zhang 4E » Tue Dec 04, 2018 9:38 am

When writing the complete ionic equation for a salt produced from the acid-base neutralization reaction, do we write all acids/bases in dissociated form(ions) or just the strong acids/bases? For example, homework J9 in 7th edition, I believe phosphoric acid, bromous acid, and hydrosulfuric acid are all weak acids, but why are they written in different forms in the ionic equation in terms of dissociation in the answer?

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Joined: Fri Sep 28, 2018 12:25 am

Re: Ionic equation

Postby RachaelKoh3A » Tue Dec 04, 2018 11:04 am

For acid-base reactions in which there is a weak acid or weak base, the textbook states to write the weak acid/base as the undissociated form in the ionic equation. This is because they dissociate to a small extent such that the dominant species in the solution will be its undissociated form. So, only the strong acids/bases will be written as its dissociated species.

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