oxidation numbers (1 Viewer)

[lanvins]

How do u find the charges (C, N, O) in Cu(NO3)2?

i don't get why (NO3)2 has a charge of 1

And how did you know the charge of Cu was 2+, its a transition metal

 

[namburger]

And how did you know the charge of Cu was 2+, its a transition metal

Well, the molecule,Cu(NO3)2, has no charge so its total oxidation number is 0
Nitrate ( NO3) is an ion with charge -1
From Cu(NO3)2 there are 2 nitrate ions, therefore 2 x -1 = -2
Since the total is 0, copper must have oxidation number of +2.

The equation:

[Cu 2+ + (NO3)-] ---> Cu(NO3)2

How do u find the charges (C, N, O) in Cu(NO3)2?

For copper its 2+
For oxygen, i'm preety sure it is always 2-

To find N
NO3 has a charge of -1, so it has a total oxidation number of -1
3 x -2 + N = -1
N = +5

 

[Mark576]

For oxygen, i'm preety sure it is always 2-

Well, oxygen actually has 7 different oxidation states. All we need to know:
OS(O) in H₂O₂ = -1 [peroxides]
OS(O) in H₂O = -2 [oxides]
OS(O) in O₂ = 0 [of course :uhhuh:]

OS - oxidation state.

The other possible OS(O) are -1/2, -1/3, +1 and +2.

 

[uberturtle]

^^
too pro

Oxygen uncombined or as an oxide is always -2 yehh

 

[undalay]

lol just remember WHAT oxidation numbers actually are.
Then you'll never go wrong :]