Timeline for Why aluminum does not form ammonia complex ion?
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S Oct 6, 2022 at 12:08 | history | bounty ended | CommunityBot | ||
| S Oct 6, 2022 at 12:08 | history | notice removed | CommunityBot | ||
| Oct 4, 2022 at 21:33 | vote | accept | satoru kurita | ||
| Oct 4, 2022 at 20:46 | answer | added | Maurice | timeline score: 2 | |
| S Sep 28, 2022 at 10:51 | history | bounty started | Nilay Ghosh | ||
| S Sep 28, 2022 at 10:51 | history | notice added | Nilay Ghosh | Draw attention | |
| Sep 25, 2022 at 7:23 | comment | added | Poutnik | There could be also said that coordinated H2O molecules around Al^3+ and Fe^3+ have due the strong field high tendency to release H+, becoming OH-, what starts to happen in mildly acidic pH, where is practically no free NH3. | |
| Sep 25, 2022 at 6:49 | comment | added | satoru kurita | @Poutnik Your explanation is clear. So can I say ,coulomb force is greater between OH- and Al3+ than that of NH3 and Al3+ because O is more negatively charged. And this makes it impossible for Al3+ to make NH3 complex ion? | |
| Sep 25, 2022 at 6:25 | comment | added | Poutnik | @satorukurita With high intensity of electrostatic field around Al^3+, it is a strong advantage for OH- to have negative charge, compared to neutral NH3. Furthermore, there is possibility to form hydroxide and oxide bridges. Similar for Fe^3+. | |
| Sep 24, 2022 at 7:04 | comment | added | satoru kurita | @Mithoron thank you for explaining about hydrolyzing tendency. So, is it okay to say that since Al3+ makes strong bond between OH⁻, it is difficult to make complex ion with NH3? But I wonder how they can make strong bond with OH- not with NH3. | |
| Sep 23, 2022 at 15:04 | comment | added | Mithoron | related chemistry.stackexchange.com/questions/167995/… | |
| Sep 23, 2022 at 12:41 | comment | added | Poutnik | @satorukurita Generally, hydrolyzing tendency progressively grows with the ion charge. All $\ce{M^3+}$ and $\ce{M^4+}$ have strong hydrolysing tendency. $\ce{Ce^4+}$ is known to exist as a dimer with oxide or hydroxide bridges. | |
| Sep 23, 2022 at 12:18 | comment | added | satoru kurita | @NilayGhosh The paper you mentioned is interesting. I didn't know the existence of free e- (NH3)n and the fact that it is blue in some kind of solution. | |
| Sep 23, 2022 at 12:17 | comment | added | satoru kurita | @Poutnik If it is not bothering I would appreciate it if you could explain why aluminium ions have strong hydrolysing tendency. | |
| Sep 23, 2022 at 9:43 | comment | added | Nilay Ghosh | You can check: chemistry.stackexchange.com/questions/138924/… or this sciencemadness link: sciencemadness.org/talk/viewthread.php?tid=10977 | |
| Sep 23, 2022 at 8:00 | comment | added | Poutnik | Aluminium ions have strong hydrolysing tendency and aluminium has generally affinity to oxygen. | |
| S Sep 23, 2022 at 7:33 | review | First questions | |||
| Sep 23, 2022 at 19:09 | |||||
| S Sep 23, 2022 at 7:33 | history | asked | satoru kurita | CC BY-SA 4.0 |