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Offline science fan

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ion equations of bases
« on: October 15, 2009, 07:52:15 AM »
Hi

Q. Write ionic equations for the reactions which occur when the following bases dissolve in water.

i) sodium hydroxide (strong base)
ii) Ammonia (weak base)
iii) Calcium hydroxide (strong base)
iv)hydrazine (weak base)

I have attempted (ii)

NH3+(aq) + H2O(l) --> NH4+ + OH-

I know that for weak bases you include reversible arrows i.e. double arrows to represent a reverse reaction seeing they only partially dissociate or ioinize to produce OH- ions


Help is greatley appreciated

Thank you

Offline Borek

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Re: ion equations of bases
« Reply #1 on: October 15, 2009, 08:01:33 AM »
NH3+(aq) + H2O(l) --> NH4+ + OH-

I know that for weak bases you include reversible arrows i.e. double arrows to represent a reverse reaction seeing they only partially dissociate or ioinize to produce OH- ions

So why have you not used double arrow, if ammonia is listed as a weak base?
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Offline science fan

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Re: ion equations of bases
« Reply #2 on: October 15, 2009, 08:20:46 AM »
sorry it was a silly error

Offline Borek

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Re: ion equations of bases
« Reply #3 on: October 15, 2009, 11:40:02 AM »
Ah, OK. So you seem to be on the right track, try next :)
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