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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: xeadgbex on November 29, 2009, 05:00:29 PM

Title: Complete Ionic Equation? Hmm
Post by: xeadgbex on November 29, 2009, 05:00:29 PM
PROBLEM 1: A few drops of nitric acid (HNO3) are added to a buffer of ammonia (NH3) and ammonium chloride (NH4Cl) in water.
**Write the complete ionic equation for the reaction that occurs**
Complete ionic equations represent soluble ionic compounds as separated ions.
Every element of this equation needs to be correct from the phases to the middle arrow.

I'm thinking something like this?
HNO3-(aq) + NH3(aq) + Cl-(aq) + OH-(aq) -> NH4Cl(aq) + NO3-(aq) + H2O(l)
or
NH3(aq) + H+(aq) -> NH4+(aq)

PROBLEM 2:
A few drops of potassium hydroxide (KOH) solution are added to a buffer of ammonia (NH3) and ammonium chloride (NH4Cl) in water.
**Write the complete ionic equation for the reaction that occurs**
Same type of problem as above.
I've tried:
NH4+(aq) + OH-(aq) -> NH3(aq) + H2O(l)

But I always get these problem wrong.

Any help would be very much appreciated.
Thank you.

Title: Re: Complete Ionic Equation? Hmm
Post by: Dan on November 29, 2009, 05:57:38 PM
NH3(aq) + H+(aq) -> NH4+(aq)

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

These look like the correct net ionic equations... maybe if you add all the spectator ions you will have the full ionic equation? Are these online questions assessed by a computer?
Title: Re: Complete Ionic Equation? Hmm
Post by: xeadgbex on November 29, 2009, 06:55:29 PM
Yes this is confusing me. I don't think they want the net ionic. I suppose the complete ionic is something different? I don't know what that would look like in this case :-/

And yes these are all counted by an online program.
Title: Re: Complete Ionic Equation? Hmm
Post by: AWK on November 30, 2009, 01:57:47 AM
Quote
HNO3-(aq)
???