February 24, 2024, 04:39:04 AM
Forum Rules: Read This Before Posting


Topic: Ammonia + Sulfuric acid reaction?  (Read 64301 times)

0 Members and 1 Guest are viewing this topic.

Offline Youngstudent

  • Very New Member
  • *
  • Posts: 1
  • Mole Snacks: +0/-0
Ammonia + Sulfuric acid reaction?
« on: December 20, 2007, 09:27:06 PM »
I am trying to do this question in my book that reads:
A 25.0 mL sample of sulfuric acid is completely neutralized by adding 32.8 mL of 0.116 mol/L ammonia solution. Ammonium sulfate, (NH4)2SO4, and water are formed. What is the concentration of the sulfuric acid?
And here I am trying to balance the equation for an hour until I finally gave up? So is that an error in the question or is my brain just not working?

Offline Yggdrasil

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 3215
  • Mole Snacks: +485/-21
  • Gender: Male
  • Physical Biochemist
Re: Ammonia + Sulfuric acid reaction?
« Reply #1 on: December 20, 2007, 09:52:47 PM »
Ammonia is basic because it reacts with water to create hydroxide ions.

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

I hope this helps.

Offline IITian

  • Regular Member
  • ***
  • Posts: 74
  • Mole Snacks: +4/-2
  • Materials & Chemical Engineer
Re: Ammonia + Sulfuric acid reaction?
« Reply #2 on: December 23, 2007, 06:44:55 AM »
Further,

2NH4OH + H2SO4=(NH4)2SO4+2H2O
« Last Edit: December 23, 2007, 07:18:01 AM by Borek »

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27600
  • Mole Snacks: +1794/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Ammonia + Sulfuric acid reaction?
« Reply #3 on: December 23, 2007, 07:19:03 AM »
You can edit your posts - just click on Modify :)
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline IITian

  • Regular Member
  • ***
  • Posts: 74
  • Mole Snacks: +4/-2
  • Materials & Chemical Engineer
Re: Ammonia + Sulfuric acid reaction?
« Reply #4 on: December 23, 2007, 07:26:36 AM »
thanks  :-[

Offline Atome

  • Regular Member
  • ***
  • Posts: 78
  • Mole Snacks: +2/-3
Re: Ammonia + Sulfuric acid reaction?
« Reply #5 on: April 07, 2008, 05:02:17 PM »
Ammonia is basic because it reacts with water to create hydroxide ions.

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

I hope this helps.

Hello there,

For this chemical equation, where would there be water with which ammonia would react to form ammonium hydroxide (NH4OH)? Would it be the water in the aqueous ammonia solution?

Thanks.

Offline Arkcon

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7367
  • Mole Snacks: +533/-147
Re: Ammonia + Sulfuric acid reaction?
« Reply #6 on: April 07, 2008, 05:38:01 PM »
Yes, we kinda all assumed it was a aqueous reaction, because the ammonia was given as a concentration, molarity, and not as a gas or a liquefied ammonia.  Basic high school chemistry tend to gloss over reaction in liquid ammonia, or other liquefied polar gases, exciting though they are.
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline Atome

  • Regular Member
  • ***
  • Posts: 78
  • Mole Snacks: +2/-3
Re: Ammonia + Sulfuric acid reaction?
« Reply #7 on: April 07, 2008, 06:25:50 PM »
Thanks for your reply, Arkcon.

When I performed the stoichiometry calculations, I did not get the textbook's answer.

Since the reactants are H2SO4 + 2NH4OH, the mole-mole ratio is 1:2.

NH4OH in mols = 0.0328 L x 0.116 M

                                   = 0.0380 mol

Therefore:

[H2SO4] = 0.0190 mol/0.0250 L = 0.760 M

The textbook gives an answer of 0.304 M.

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27600
  • Mole Snacks: +1794/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Ammonia + Sulfuric acid reaction?
« Reply #8 on: April 07, 2008, 06:38:37 PM »
No matter what's in textbook, 0.07608M is correct. Or 0.0761M to use 3 sigfigs.

Edit: typo (781 instead of 761) corrected.

See how easy it is to solve such a problem with the EBAS, stoichiometry calculator: https://www.facebook.com/watch/?v=522861421884614
« Last Edit: April 09, 2008, 03:16:43 AM by Borek »
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline Atome

  • Regular Member
  • ***
  • Posts: 78
  • Mole Snacks: +2/-3
Re: Ammonia + Sulfuric acid reaction?
« Reply #9 on: April 09, 2008, 05:01:22 PM »
All right. Thanks for your help Borek!

Sponsored Links