[MrP.]

Can someone help me with electrolysis of NaNO3(l) and NaNO3(aq)

[thetada]

What help do you need? Are you actually doing the electrolysis or is it for a homework question / project? We do offer help but the forum rules state that you need to show your own efforts to solve any problems.

[MrP.]

I'm practising for test and this was the question from the book that we didn't do ao we will have it in test probably

I don't understand the first one NaNO3 - Na+ + NO3- what to do with NO3- It's impossible to have NO3 that isn't ion

[thetada]

It would really help if you included the question in a post.

Are you asking what would be the products if you performed electrolysis on molten NaNO₃? (NaNO_3(l))

If so, can you suggest what products you might get?

[MrP.]

I did this one like in school but I don't understand the other one when it's molten
Task says just write electrolysis of molten NaNO₃ and when it is in water
Btw I'm from Croatia so sorry for bad English

NaNO₃(aq) -> Na⁺ + NO₃^-
H₂O -> H⁺ + OH^-

2H₂O + 2e^- -> H₂ + 2OH^-  /*2
2H₂O - 4e^- -> O₂ + 4H⁺

2H₂O -> O₂ + 2H₂

[AWK]

In water you may expect additional reaction - reduction of NO₃^- to NO₂^- by hydrogen.
For electrolysis of molten salt you have a very narrow temperature range (about 50 C - between 320 and 380). Above 380 C nitrate completely decompose to nitrite. During electrolysis additional reaction will reduce nitrate to nitrite. At the second electrode you will get two gases.