Timeline for Buffer problem in polyprotic acids [duplicate]
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
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| May 29, 2021 at 20:06 | comment | added | Ashish | I closed it under the wrong question by mistake since that doen't really answer it rather if I were to choose one I would say that it was the more similar to this chemistry.stackexchange.com/questions/40054/… please change it If it can be | |
| May 29, 2021 at 20:05 | history | closed |
Mathew Mahindaratne Mithoron Tyberius♦ S R Maiti CommunityBot |
Duplicate of Short Cut Method to Calculating pH of Polyprotic Acid? | |
| May 29, 2021 at 20:04 | comment | added | Ashish | Acid Base reaction! My bad, I was considering it's dissociation as a WA in solution | |
| May 29, 2021 at 19:45 | comment | added | Poutnik | @Ashish You do not expect strongly acidic H3PO4 and strongly alkalic PO4^3- can survive aside each other, do you ? | |
| May 29, 2021 at 19:16 | comment | added | Ashish | Ok I read the question above and it starts with $\ce{H_2PO_4^-}$ and $\ce{HPO_4^{2-}}$ . I could use that in here but my doubt is that and also with comment made by @Poutnik The $Ka1$ of the acid is given as $10^{-5}$ so how can I assume that $\ce{H_3PO_4}$ is getting 100% dissociated into $\ce{H_2PO4^-}$ | |
| May 28, 2021 at 13:47 | comment | added | Rishi | @Ashish This helps chemistry.stackexchange.com/questions/40054/… ? | |
| May 28, 2021 at 10:57 | comment | added | Poutnik | Correction 0.5 M + 0.5 M - simple error. | |
| May 28, 2021 at 10:04 | comment | added | Poutnik | It would be 1 M NaH2PO4 + 1 M Na2HPO4 ( hydrolysis neglected), so pH=pKa2. ( simplification assuming activity coefficient is 1, what is expected in this task context, otherwise not really justified ). It is high concentration, buffers are usually much more diluted solutions, typically 0.05-0.1 M. | |
| May 28, 2021 at 9:40 | history | edited | Ashish | CC BY-SA 4.0 |
added 118 characters in body
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| May 28, 2021 at 8:57 | review | Close votes | |||
| May 29, 2021 at 20:05 | |||||
| May 28, 2021 at 8:52 | history | edited | Mathew Mahindaratne | CC BY-SA 4.0 |
Improved formatting and clarity.
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| May 28, 2021 at 8:46 | comment | added | Ashish | @NisargBhavsar Oh, that makes sense. I understand why it's wrong now | |
| May 28, 2021 at 8:43 | comment | added | Ashish | @MathewMahindaratne Doesn't seem to me like they are the same questions because it's hydrolysis is also to be considered in this case since the concentration of Na3PO4 is also given which is not taken in the linked question. Rather the linked question would answer my question if only the concentration of H3PO4 was provided to me | |
| May 28, 2021 at 8:15 | comment | added | Nisarg Bhavsar | Your assumption that the phosphate ion will not hydrolyze makes your attempt incorrect. Final concentration of phosphate will not be equal to it's initial concentration. | |
| May 28, 2021 at 8:02 | history | asked | Ashish | CC BY-SA 4.0 |