Timeline for Question about percentage purity and percentage yield [closed]
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
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| Jul 29, 2023 at 4:56 | history | closed |
Mithoron Mathew Mahindaratne Todd Minehardt Jannis Andreska Jon Custer |
Not suitable for this site | |
| Jul 24, 2023 at 0:30 | vote | accept | Shadow sparkle | ||
| Jul 23, 2023 at 7:49 | comment | added | Poutnik | @Buttonwood If one mixes e.g. 7 g of pure iron with 3 g of mixture of original hematite impurities, remaining Al, Al2O3 and not reacted hematite, one can easily get heterogenous mixture with 70% iron purity.(. Not sure if Al and Fe makes alloy). Anyway, the task gives vibes of made up task for computation exercise, so I would not worry so much about how much it reflects reality. | |
| Jul 22, 2023 at 13:09 | review | Close votes | |||
| Jul 29, 2023 at 4:56 | |||||
| Jul 22, 2023 at 2:15 | answer | added | MaxW | timeline score: 0 | |
| Jul 21, 2023 at 19:53 | comment | added | Buttonwood | @Poutnik Wikipedia reports a density of solid $\ce{Al2O3}$ (though not sure which polymorph) of $\pu{3.987 g/cm³}$ (ref and for molten Fe of $\pu{6.98 g/cm³}$ (ref). While I don't know if the two easily mix into each other during a thermite reaction (welding of train rails), maybe the lower part of the «bucket» the workers use to join rails to join is at least enriched in Fe, while portions richer in $\ce{Al2O3}$ yield a protective blanket to prevent Fe to oxidize again at these high temperatures. | |
| Jul 21, 2023 at 19:45 | comment | added | Shadow sparkle | @Poutnik So do you mean when the reaction is taking place some molecules or atoms are forming their own reactions with our products ? | |
| Jul 21, 2023 at 19:44 | comment | added | Buttonwood | For the body of questions, answers, and comments, chemistry.se offers you to use mhchem. Don't apply it to the titles of questions, though (because it is an extension not every web browser processes equally well). | |
| Jul 21, 2023 at 19:42 | history | edited | Buttonwood | CC BY-SA 4.0 |
balance the reaction equation, deploy mchem syntax
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| Jul 21, 2023 at 19:40 | comment | added | Poutnik | They are not pure if mixed with something else. | |
| S Jul 21, 2023 at 19:27 | review | First questions | |||
| Jul 24, 2023 at 0:36 | |||||
| S Jul 21, 2023 at 19:27 | history | asked | Shadow sparkle | CC BY-SA 4.0 |