Chromatography Forum

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1) if I understand, you want to prepare elemental sodium? Elemental sodium has some issues in handling.

2) The nitrite anion is just as "whole" an anion as is nitrate. They just have different oxidation states.

3) Before sending you in the direction of a book on laboratory preparations, what is your educational background in chemistry or the sciences? This would help to give appropriate guidance.

1) if I understand, you want to prepare elemental sodium? Elemental sodium has some issues in handling.

2) The nitrite anion is just as "whole" an anion as is nitrate. They just have different oxidation states.

3) Before sending you in the direction of a book on laboratory preparations, what is your educational background in chemistry or the sciences? This would help to give appropriate guidance.

Thanks , i am analytical chemist ( Msc ) .

Don't worry you can give me the hard book i will eat it in reading by the way you haven't explained to me how to prepare an elmental Na as 1 M from that salt to use it as standard .

By the way you can take any example such as K or Ca etc

If you are looking ot make a solution that is one molar in sodium from sodium nitrite, you are not looking to prepare elemental sodium from the sodim nitrite, because elemental sodium is sodium metal.

It looks like you want to know how to make a solution of sodium nitrite that is one molar in sodium. Given that this is a question often given in homework for freshman chemistry students, I will stall on answering this question so that if you happen to be one of those students, I do not want to be doing your homework. I'll be glad to revisit this in about 10 days because homework assignments will be turned in by then. So, February 15'th OK?

For a book on this kind of preparation, any freshman chemistry text will do.

If you are looking ot make a solution that is one molar in sodium from sodium nitrite, you are not looking to prepare elemental sodium from the sodim nitrite, because elemental sodium is sodium metal.

It looks like you want to know how to make a solution of sodium nitrite that is one molar in sodium. Given that this is a question often given in homework for freshman chemistry students, I will stall on answering this question so that if you happen to be one of those students, I do not want to be doing your homework. I'll be glad to revisit this in about 10 days because homework assignments will be turned in by then. So, February 15'th OK?

For a book on this kind of preparation, any freshman chemistry text will do.

Mr.Don_Hilton,

Althugh i do not accept this ( i am not lier i said i am analytical chemist ( Msc ) . ) but thanks for your help ( or mockery comment ) Never mind ,,, Good people are still be there ...

Hi Ronaldo

There might be some progress on this if you can explain more clearly what it is that you need to do - on first reading you need to prepare 1 mole of sodium from sodium nitrite, but maybe you need a solution of sodium nitrite with 1M/l of sodium in it, or maybe something else entirely that is more difficult and more interesting. The third possibility is based on the preparation of molar solutions being in chemistry textbooks at school level, so why would you be asking about that at M.Sc level ?

Peter

I know how to do a 1M solution of sodium Nitrite ( yes that is a very baby step ) but when it comes to prepere it as just 1M sodium in that solution , the idea is totally new at me .I ask a british post doctor in our department and he didn't know .He knows how to prepare it as awhole .

Any way i don't want any help from you either .I feel reading books to find out it is much better than *insulting * and first of all * free *

That's my sign out forever from this forum .Thanks

Come on, people; you *were* a bit hard on the poor guy. He *did* ask the question in the right forum, and he *did* admit it was a dumb question. I've asked a lot of those in my career, and learned from the answers.

So, for the record, if you prpare a 1 molar solution of NaNO3, it will be 1 molar in Na+ and 1 molar in NO3-. It is impossible to create a 1 molar solution of Na (no charge) in water, for reasons that are obvious to anyone who has ever "liberated" a bit of sosium metal from a high-school chem lab and tossed it into a snowbank .

OK, so here's another "dumb" question - what is the concentration of sodium in 1 molar sodium nitrite ? I would have bet cash money that it was 1M, and that a chemist with an MSc would know that, and I would have won both bets, and since the OP does know how to make 1M sodium nitrite, but not how to make 1M sodium using sodium nitrite I thought that he must actually need to do something else. And as he stated the question the only clue that he is talking about solutions rather than an inorganic preparation is the "M".

I now wonder if the question is not a variant of "how do you make a solution of sodium sulphate that is 1M in sodium", or maybe it is going in the direction of working out buffer compositions based on weak electrolytes where the concentration of the element is not the same as the concentration of the ion. If it is from a standard method it is odd that the instruction was not more explicit - "make a 1M solution of sodium nitrite" would be clearer perhaps.

Peter

After many posts, we've all learned how hard it is to navigate between the extremes of being patronizing on the one hand and baffling on the other.

I think it's equally hard for new members to realize that we can't look over their shoulder to see what they're doing and that we don't know their background / education / skill levels.

Tom,

I try to not be hard on students - or even those who have as many degrees as they are going to get. And I may have missed on that matter with this poor fellow. I looked at the question asked for clarity and indication of understanding demonstrated in the question. Seeing the preparation being from sodium nitrite and the question wondering as to why the preparation was not from the whole molecue - and the formula for the nitrate shown. I see 1) what appears to be a question typical of a freshman ( or high school) chemistry assignment and a differentiation between a whole molecule (sodium nitrate) and sodium nitrite - which are both salts. And one as whole a compund as the other. So I tried to get a bit more informatin to be sure that I was not workign a homework problem for someone having problems with some basic chemistry concepts - and I got no clarification, at least that I recognized. Perhaps my attempt to gain this information was done poorly.

I still scratch my head over elemental sodium in solution. I have made a sodium dispersion (sodiium melted in hot toluene, stirred rapidly) and am aware of sodium disolved in liquid ammonia. But the first is not a solution and the second evloves hydrogen gas as it turns to sodiumamide, which is again a sodium compund in solution. And from the reading I've done you do not want to put sodium nitrite in liquid ammonia -- the product is apparently an energetic compound. Neither of these seems to be particulary good standard solution.

I had no intention to insult rather than help. If Ronaldo was trying to follow a published procedure, I would love for him to post the reference and it could be interesting to try to figure out what someone had intended.

Dear experts,

I am guessing that Ronaldo is a student (junior high school, to be exact). As for me, I learned O-Chem for a year in HS.
So, here is my answer appropriate for his grade level:
[Na+] = [NaNO2] = 1M

I am asking that people posting on this "students" area explicitly state they current grade level. Knowing your background will help a lot. And stating your current textbooks will help too (hope that there is an English equiv.)
The experts can just tell you: "Open Organic synthesis by Carey, vol2, to page zzz."
Or "open O-Chem by Solomon, to page zzz."

Alfred

I think several other replies made the same assumption about the OP's experience level. That was why he felt insulted:

i am analytical chemist ( Msc )