CN- Lewis Structure (Cyanide ion)
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- Опубликовано: 7 июн 2022
- In this video we'll go through the steps to write the CN- Lewis Dot Structure (Cyanide ion).
For the CN- structure use the periodic table to find the total number of valence electrons for the CN- molecule. Once we know how many valence electrons there are in CN- we can distribute them around the central atom with the goal of filling the outer shells of each atom.
In the Lewis structure of CN- structure there are a total of 10 valence electrons. CN- is also called Cyanide ion.
---- Steps to Write Lewis Structure for compounds like CN -----
1. Find the total valence electrons for the CN- molecule.
2. Put the least electronegative atom in the center. Note: Hydrogen (H) always goes outside.
3. Put two electrons between atoms to form a chemical bond.
4. Complete octets on outside atoms.
5. If central atom does not have an octet, move electrons from outer atoms to form double or triple bonds.
---- Lewis Resources ----
• Lewis Structures Made Simple: • How to Draw Lewis Stru...
• More practice: • Lewis Dot Structure Pr...
• Counting Valence Electrons: • Finding the Number of ...
• Calculating Formal Charge: • Formal Charges: Calcul...
• Exceptions to the Octet Rule: • Exceptions to the Octe...
Lewis Structures, also called Electron Dot Structures, are important to learn because they help us understand how atoms and electrons are arranged in a molecule, such as Cyanide ion. This can help us determine the molecular geometry, how the molecule might react with other molecules, and some of the physical properties of the molecule (like boiling point and surface tension).
Chemistry help at www.Breslyn.org
Your teaching videos are a blessing to my study journey, thank you a million.
Thank you for your service. I am graduating chemistry, so long
Awesome, congrats and all the best!
Thanks. I’m a little unsure why the carbon has a formal charge of -1. I think I was taught to try and make the more electronegative element have the lower charge. Does the octet rule trump that though?
No , originally it was HCN- but since H got removed and it(H) being less electronegative gave the left the electron to cyanide
Hi. Thanks for the video. Can you pls make one for B4C (Boron Carbide?
Hello doctor.I'm confused that why we have shifted two electrons of nitrogen in the middle?
CAN YOU ALSO EXPLAIN HOW TO CALCULATE COORDINATION NUMBER IT WILL BE REALLY HELPFUL THOUGH
I don't have any videos on coordination number but this might be helpful:
chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/08%3A_Ionic_and_Metallic_Bonding/8.08%3A_Coordination_Number
But... uh the carbon does not need its octet to be full filled right because it's in period 2 ... so??
Where does that extra electron (-) come from?
If carbon has 4 valence electrons, and nitrogen has 5, how do we end up with 10?
My best guest is that somewhere along some process, the nitrogen picked up an extra electron?
The extra electron comes from the negative 1 charge of CN-, for example in SO3 2- you would add two extra electrons.
@@kyrosen613where did it get one more electron bro?
@@stash3290bro it was originally HCN
That extra electron actually comes when hydrogen was broken from the compound and H left as H+(being less electronegative)
Hello doctor is Mg(OH)2 weak or strong base ?
It is usually considered weak but there is disagreement. In practice very little will dissolve in water. So it's usually best to make sure you follow what your instructor says.
There is a good discussion at: chemistry.stackexchange.com/questions/136504/how-can-magnesium-hydroxide-be-a-strong-base-and-be-sparingly-soluble-at-the-sam
@@wbreslyn Thank you very much doctor