Can an organic ion have a charge of -3?

AI Thread Summary
The discussion revolves around the formation of organic ions and their charges, specifically questioning whether an organic ion can have a charge of -3. Participants clarify that organic ions typically have a charge of -1, using examples like sodium ethoxide. They explore the conditions under which sodium can react with organic compounds, emphasizing the need for specific functional groups. The conversation highlights the necessity of finding a compound with three reactive protons to potentially form a -3 charge, but ultimately concludes that the answer lies in identifying a compound with only one carboxylic acid group, leading to a -1 charge. The final consensus points to option C as the correct answer based on the reactions discussed.
Janiceleong26
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The Attempt at a Solution


I can't seem to see how an organic ion with charge -3 is formed. I thought an organic ion will always have a charge of -1? Like sodium ethoxide CH3CH2CO-Na+ ?
I know that Na can only react with alcohols and carboxylic acids, so B and D are probably out, though B has carboxylic acid grp and D has alcohol grp in it..
 
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Janiceleong26 said:
I thought an organic ion will always have a charge of -1?

Why? What is a charge of the anion in disodium oxalate? Trisodium citrate?

Janiceleong26 said:
I know that Na can only react with alcohols and carboxylic acids

You are looking for a compound that has a single proton acidic enough to be neutralized by NaOH, and three protons that can react with Na. You are right about B & D being out.
 
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Borek said:
Why? What is a charge of the anion in disodium oxalate? Trisodium citrate?
You are looking for a compound that has a single proton acidic enough to be neutralized by NaOH, and three protons that can react with Na. You are right about B & D being out.
-2 and -3 :biggrin: sorry I didn't know about this, now that I've know now...we have to find a compound that has three functional groups that can react with Na right? Which is A or C. But since they say J reacts with NaOH (aq) to produce an organic ion with -1 charge, which means there should only be 1 -COOH grp, so ans. is C
Thanks!
 
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