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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: shomerony on November 24, 2014, 12:27:59 AM

Title: HNO3 and CO2
Post by: shomerony on November 24, 2014, 12:27:59 AM

In HNO3, how does a valency of 2 (H+N) form a stable bond with 6 of Oxygen (O3) ? Similarly, in CO2, how does 2 of Carbon bond with 4 of Oxygen (O2) ?

Title: Re: HNO3 and CO2
Post by: sjb on November 24, 2014, 02:30:37 AM

Quote from: shomerony on November 24, 2014, 01:54:59 AM

Please reply someone!! I am a new member here and I need all your support.

Patience, we're not all up at the same time as you. How do you figure H+N have a valency of two?

Title: Re: HNO3 and CO2
Post by: shomerony on November 24, 2014, 04:10:14 AM

H has Valency of 1, N has valency of 1. So HN has valency of 2 rite?

Title: Re: HNO3 and CO2
Post by: Hunter2 on November 24, 2014, 04:49:16 AM

Quote from: shomerony on November 24, 2014, 04:10:14 AM

H has Valency of 1, N has valency of 1. So HN has valency of 2 rite?

Not really, look the molecule for nitric acid.

H has 1 , each O has 2 and N has 5

http://en.wikipedia.org/wiki/Nitric_acid

Title: Re: HNO3 and CO2
Post by: shomerony on November 24, 2014, 05:03:33 AM

Thanks for your reply!! Kindly explain how this happens. H2O molecule is one oxygen with 2 hydrogen. That is because each Oxygen atom has 2 protons and each hydrogen atom has one proton. Hence the water molecule is internally balanced with 2 protons of hydrogen and two protons of oxygen: H2O. HNO3 is not internally balanced.

Why does N have 5?

I understand it is balanced then because O=2*3=6, N=5 and H=1.

Kindly explain why N has 5.

Title: Re: HNO3 and CO2
Post by: Borek on November 24, 2014, 05:46:05 AM

Quote from: shomerony on November 24, 2014, 05:03:33 AM

That is because each Oxygen atom has 2 protons

No, each oxygen atom has 8 protons. You seem to be profoundly confused about something, but it is not clear about what.

Title: Re: HNO3 and CO2
Post by: Hunter2 on November 24, 2014, 06:07:23 AM

Quote from: shomerony on November 24, 2014, 05:03:33 AM

Thanks for your reply!! Kindly explain how this happens. H2O molecule is one oxygen with 2 hydrogen. That is because each Oxygen atom has 2 protons and each hydrogen atom has one proton. Hence the water molecule is internally balanced with 2 protons of hydrogen and two protons of oxygen: H2O. HNO3 is not internally balanced.

Why does N have 5?

I understand it is balanced then because O=2*3=6, N=5 and H=1.

Kindly explain why N has 5.

The protons not important. For chemical bonding the electrons you have to look.

Hydrogen has each 1 electron. Oxygen has 6 electrons and can reach the noble gas structure of 8 electrons by receiving of 2. So its easy that a molecule like water is formed.

For nitric acid : Nitrogen has 5 electrons, each of them are donated to the 3 oxygens. One oxygen receives only one. The other electron comes from the hydrogen.

Title: Re: HNO3 and CO2
Post by: shomerony on November 24, 2014, 06:39:39 AM

Thanks a lot to all of you. I am finally clear. Electrons matter, not protons.

Title: Re: HNO3 and CO2
Post by: Borek on November 24, 2014, 08:24:04 AM

Well, protons do matter - they identify the element! But they don't participate in bonding.