[decapitatedomar]

Hi, I've been facing some trouble with Oxidation Number, so I've got some questions to ask, as well as a problem I'd like to inquire about, here it goes;
1- When calculating the O.N, do you take in consideration the number of Moles? For instance, how would you calculate the O.N of Nitrogen in the following chemical formula: 2HNO₃? Do you do (2*1 + N + 3*-2) or neglect the '2' in the beginning?

2- In which of the following reactions is Nitric acid an oxidizing agent:
4HNO₃ + Cu ------> Cu(NO₃)₂ + 2H₂O + 2NO₂
or
2HNO₃ + Na₂CO₃ ------> 2NaNO₃ + H₂O + CO₂

And it would be much appreciated if you told me how you had calculated it. Hope that's not too much to ask. Thanks.

[Borek]

Hi, I've been facing some trouble with Oxidation Number, so I've got some questions to ask, as well as a problem I'd like to inquire about, here it goes;
1- When calculating the O.N, do you take in consideration the number of Moles? For instance, how would you calculate the O.N of Nitrogen in the following chemical formula: 2HNO₃? Do you do (2*1 + N + 3*-2) or neglect the '2' in the beginning?

Oxidation number is a property of an atom in a single molecule, so the stoichiometric coefficient is irrelevant. Besides, what you wrote makes no sense - 2HNO₃ means 2(HNO₃), not 2H + NO₃ what you seem to be suggesting.

Question 2 - assign oxidation numbers to nitrogen both before and after the reaction, it will answer your question.

[decapitatedomar]

Hi, I've been facing some trouble with Oxidation Number, so I've got some questions to ask, as well as a problem I'd like to inquire about, here it goes;
1- When calculating the O.N, do you take in consideration the number of Moles? For instance, how would you calculate the O.N of Nitrogen in the following chemical formula: 2HNO₃? Do you do (2*1 + N + 3*-2) or neglect the '2' in the beginning?

Oxidation number is a property of an atom in a single molecule, so the stoichiometric coefficient is irrelevant. Besides, what you wrote makes no sense - 2HNO₃ means 2(HNO₃), not 2H + NO₃ what you seem to be suggesting.

Question 2 - assign oxidation numbers to nitrogen both before and after the reaction, it will answer your question.

Okay, thanks for pointing that out, but after the reaction, which compound should I be looking at? Because Nitrogen is in two compounds; 2NO₂ and Cu(NO3)₂. Thanks, and I'm sorry I'm taking up too much of your time.

[Borek]

Okay, thanks for pointing that out, but after the reaction, which compound should I be looking at? Because Nitrogen is in two compounds; 2NO₂ and Cu(NO3)₂.

Write net ionic reaction then.