Author Topic: Chemistry question  (Read 3560 times)

Offline Got Tech? GO TECH

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Chemistry question
« on: June 06, 2010, 05:00:03 pm »
Please open O/N 06 paper 3 question 5c.). Why is water produced in this reaction? Would anybody be so kind enough to explain this point?

Thanks!

elemis

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Re: Chemistry question
« Reply #1 on: June 06, 2010, 05:16:29 pm »
Hang on

elemis

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Re: Chemistry question
« Reply #2 on: June 06, 2010, 05:20:13 pm »
Look carefully at the products and the reactants.

CO(NH2)2

Notice how Urea (above) seems to be very familiar to a combo of NH3 (ammonia) and CO2 (Carbon Dioxide) ??

But notice that the one Hydrogen from Ammonia and the One Oxygen from CO2 are missing ?

Where did they go ? Thus, you can make an informed guess that a water molecule was formed in this reaction.

I believe this reaction was part of the syllabus for 2006 but not for us.
« Last Edit: June 06, 2010, 05:29:44 pm by Ari Ben Canaan »

Offline J.Darren

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Re: Chemistry question
« Reply #3 on: June 06, 2010, 05:28:42 pm »
Look carefully at the products and the reactants.

CO(NH2)2

Notice how Urea (above) seems to be very familiar to a combo of NH3 (ammonia) and CO2 (Carbon Dioxide) ??

But notice that the one Hydrogen from Ammonia and the One Oxygen from CO2 are missing ?

Where did they go ? Thus, you can make an informed guess that a water molecule was formed in this reaction.

I believe this reaction was part of the syllabus for 2006 but not for us.
It was formerly included under "Air and water - NPK fertilisers", it has since been scraped and all we need to know for the examination would be that adding ammonia to nitric acid and sulphuric acid would produce ammonium nitrate and ammonium sulphate respectively.
Do not go where the path may lead. Go instead where there is no path and leave a trail.

elemis

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Re: Chemistry question
« Reply #4 on: June 06, 2010, 05:30:07 pm »
It was formerly included under "Air and water - NPK fertilisers", it has since been scraped and all we need to know for the examination would be that adding ammonia to nitric acid and sulphuric acid would produce ammonium nitrate and ammonium sulphate respectively.

All the better for us :D

Offline Got Tech? GO TECH

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Re: Chemistry question
« Reply #5 on: June 06, 2010, 05:31:38 pm »
Thanks alot, its good to know this, even though it's no longer in the syllabus.

elemis

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Re: Chemistry question
« Reply #6 on: June 06, 2010, 05:32:43 pm »
Thanks alot, its good to know this, even though it's no longer in the syllabus.

True. Knowledge never goes to waste ;)

Offline J.Darren

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Re: Chemistry question
« Reply #7 on: June 06, 2010, 05:36:37 pm »
True. Knowledge never goes to waste ;)
Scientia potentia est :D I recall that it is the title of one of the regulars of this forum ???
Do not go where the path may lead. Go instead where there is no path and leave a trail.

elemis

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Re: Chemistry question
« Reply #8 on: June 06, 2010, 05:39:18 pm »
Scientia potentia est :D I recall that it is the title of one of the regulars of this forum ???

Scientia Est Potentia - thats my signature (look below this post).

Knowledge Itself is power; its Latin.

I believe that knowledge conquers all. If you know all EVERYTHING is achievable.

One of the greatest gifts is knowledge; I wish my peers shared that belief too.....
 

Offline Got Tech? GO TECH

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Re: Chemistry question
« Reply #9 on: June 06, 2010, 06:34:48 pm »
Scientia Est Potentia - thats my signature (look below this post).

Knowledge Itself is power; its Latin.

I believe that knowledge conquers all. If you know all EVERYTHING is achievable.

One of the greatest gifts is knowledge; I wish my peers shared that belief too.....
 

Absolutely. Knowledge trumps any and every other aspect of life.

elemis

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Re: Chemistry question
« Reply #10 on: June 06, 2010, 06:46:16 pm »
Absolutely. Knowledge trumps any and every other aspect of life.

Glad you realise that.

elemis

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Re: Chemistry question
« Reply #11 on: June 08, 2010, 05:53:24 am »
As all IGCSE chemistry exams are over, this topic will be locked.