Timeline for Can ferrous ions exist in an acidic solution?
Current License: CC BY-SA 4.0
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| Oct 16, 2022 at 10:36 | answer | added | Nuclear Chemist | timeline score: 2 | |
| Nov 11, 2021 at 5:11 | comment | added | Jason C | Found a gold mine of info: Metal Recovery Using Oxalate Chemistry: A Technical Review. (Via semanticscholar.org/paper/…) | |
| Nov 8, 2021 at 14:57 | vote | accept | Jason C | ||
| Nov 8, 2021 at 11:30 | history | removed from network questions | orthocresol | ||
| Nov 8, 2021 at 10:47 | comment | added | Poutnik | Consider bidental complexes of Fe(II/III) and oxalate have probably different colours than respective ion aquacomplexes. | |
| Nov 8, 2021 at 10:39 | history | became hot network question | |||
| Nov 8, 2021 at 4:47 | answer | added | ACR | timeline score: 9 | |
| Nov 8, 2021 at 3:55 | comment | added | Todd Minehardt | @JasonC - Over several pH ranges you will get iron(III) precipitates. As a geochemist, I am most familiar with naturally-occurring goethite and limonite in areas I have studied. Have a look at the iron(III) oxide-hydroxides for more info, including precipitation of iron(III) oxyhydroxide from solution at pH ranging from 6.5 to 8 by addition of NaOH to a solution of ferric chloride/nitrate. | |
| Nov 8, 2021 at 3:49 | history | edited | Jason C | CC BY-SA 4.0 |
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| Nov 8, 2021 at 3:47 | comment | added | Jason C | Re: This question... now after a little more reading, I'm wondering if maybe my oxalic acid solution contains ferrioxalate ions too (or instead), although that's specific to my oxalic acid experiments rather than acids in general. But still... 🤯 Apparently those are light sensitive though, so maybe my UV laser will do something if the wavelength is right? That's an experiment for tomorrow. | |
| Nov 8, 2021 at 3:32 | history | edited | Jason C |
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| Nov 8, 2021 at 3:20 | comment | added | Ed V | I think the answer to the first of your two questions is yes, but I am not an expert on iron chemistry and it is a bit complicated anyway. As for adding baking soda, someone else may have an answer or hunch. | |
| Nov 8, 2021 at 3:20 | comment | added | Jason C | (I just needed to confirm my suspicion about the iron ions in acid first before posting the next question, to make sure that question even made sense.) | |
| Nov 8, 2021 at 3:16 | comment | added | Jason C | Thanks for digging that up! Sort of OT but does that mean iron ions will readily precipitate as iron oxides in an alkaline solution? Cause that is related to a question I was actually going to post later, to confirm my suspicions about why the acidic solution turns reddish brown as it presumably becomes saturated with iron (which is incidentally the real reason I asked about iron raising the pH in this question), and why adding more acid turns it bright green again. Also why it turns reddish brown when I mix it with sodium bicarbonate. (No spoilers please lol) | |
| Nov 8, 2021 at 3:08 | history | edited | Jason C | CC BY-SA 4.0 |
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| Nov 8, 2021 at 3:07 | comment | added | Ed V | Ferrous ions are easily oxidized by oxygen in the air: chemistry.stackexchange.com/q/31243/79678. Other questions and answers here may be helpful. | |
| Nov 8, 2021 at 2:48 | history | edited | Jason C | CC BY-SA 4.0 |
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| Nov 8, 2021 at 2:43 | history | edited | Jason C | CC BY-SA 4.0 |
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| Nov 8, 2021 at 2:37 | history | asked | Jason C | CC BY-SA 4.0 |