I overheard people at my university talking about an experiment the did, and it stuck on my mind. I'm just starting out studying and I'm also not a native English speaker, so excuse the language barrier.
They had waster water from recycling plant, and they wanted to precipitate Lithiumphosphate from it. They first used phosphoric acid and later put in NaOH to reach a pH value of around 11.
I was wondering if it wouldn't be smarter to just use something like Sodiumphosphate as a solid to precipitate Lithiumphosphate. Why would they choose H3PO4 for it and what actually happened here?
I know it would be smarter to speak to them directly but I never saw them afterwards and don't know their supervisor. As it just a question I ask myself I didn't want to create that big a fuzz about it
Any help would be greatly appreciated!