DMT-Nexus member
Posts: 70 Joined: 10-Nov-2018 Last visit: 23-Jun-2023
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I have a container with harmala acetate salt that has been dissolved in water. I start adding sodium carbonate. After a few grams, it turns milky and freebase harmala starts precipitating. Measure the ph: 10. So I add some more sodium carbonate, dissolve it, measure ph again: 10. Add more, measure: 10. Why is it that I can easily increase the ph of plain water to above 11, but when I do the same with water with harmala, it won’t go beyond 10? Thanks.
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DMT-Nexus member
Posts: 465 Joined: 24-Nov-2021 Last visit: 02-Apr-2022 Location: Here
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igorcarajo wrote:I have a container with harmala acetate salt that has been dissolved in water. I start adding sodium carbonate. After a few grams, it turns milky and freebase harmala starts precipitating. Measure the ph: 10. So I add some more sodium carbonate, dissolve it, measure ph again: 10. Add more, measure: 10. Why is it that I can easily increase the ph of plain water to above 11, but when I do the same with water with harmala, it won’t go beyond 10? Thanks. Sounds like chemical buffering to me…constant pH within a range, at some point one incremental molecule will dramatcally change pH…in this case, upward.
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DMT-Nexus member
Posts: 70 Joined: 10-Nov-2018 Last visit: 23-Jun-2023
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Thanks for the response. So I guess my question is: how high do I need to get the ph if I want to precipitate all the harmalas?
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DMT-Nexus member
Posts: 465 Joined: 24-Nov-2021 Last visit: 02-Apr-2022 Location: Here
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igorcarajo wrote:Thanks for the response. So I guess my question is: how high do I need to get the ph if I want to precipitate all the harmalas? You might want to peruse this: https://wiki.dmt-nexus.me/Main_Page
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analytical chemist
   
Posts: 7463 Joined: 21-May-2008 Last visit: 03-Mar-2024 Location: the lab
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Rule of 2. pKa + 2 = >99% free base. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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DMT-Nexus member
Posts: 465 Joined: 24-Nov-2021 Last visit: 02-Apr-2022 Location: Here
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