Strong Acid + Weak Base...no reaction?

[nindra]

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Hey guys,
This was a question I encountered in a TPR Gen Chem Passage.

Q: Titrating a solution of NH3 with a strong acid would result in:

A. A basic salt at the equivalence point
B. An acidic salt at the equivalence point
C. A neutral salt at the equivalence point
D. No reaction.

The correct answer is D, but I selected B. Why is D the answer? As far as I know, titrating a weak base with a strong acid should give an acidic salt at the equiv. point.

 

[nindra]

bump

 

[nabilesmail]

Tricky, NH3=ammonia, is a liquid WITHOUT water. I don't know if that is why their is no reaction

 

[Hexon]

because you forgot to put the acid in a burette😛

 

[loveoforganic]

Tricky, NH3=ammonia, is a liquid WITHOUT water. I don't know if that is why their is no reaction

Ammonia's a gas. Regardless, there would be a reaction, I think this is just a typo

 

[lolcat]

What was their explanation?

 

[Godric]

I was wrong~ or it could be D or B at this point

 

[nindra]

Hey guys, I apologize for the late response.

Their explanation was this:

NH3 is a weak base, and solution D is a strong acid. Therefore, the equivalence point will be in the acidic range, because when all the NH3 is neutralized, NH4Cl and H2O will remain. NH4Cl is an acidic salt.

****...re-reading their explanation makes me think that I actually got the answer right..it seems it was them who messed it up...

It sucks because this is not the first time I have come across with an error in these problems with TPR 😡

 

[gettheleadout]

Tricky, NH3=ammonia, is a liquid WITHOUT water. I don't know if that is why their is no reaction

Ammonia's a gas. Regardless, there would be a reaction, I think this is just a typo

Also, the problem says a solution of ammonia, meaning ammonia dissolved in a solvent.

But yeah, D is incorrect.

 

[indianjatt]

Yeah it should be acidic. You'll form NH4+, which is an acid.