I need help dissolving metaphosphoric acid (colorless, crystalline chip that has been grinded to small particles) in water. Mixing, sonification, and mild heat isn't working well. Any advice would be helpful.
Maybe water steam in reflux with a soxlet. Acid in the extraction cell, condensing HT water bring down acid but acid does not goes up again.
I feel like this process will offset my concentration of 3% and 6% phosphoric acid. My apologies for not specifying this in my question and thanks for sharing this unique approach with me. Btw, after letting it mix on mild heat overnight, I did see significant improvement.
We use a m-phosphoric acid reagent in a Vitamin C experiment. I use some glacial acetic acid to help dissolve it.
FYI, metaphosphoric acid is not very stable in other acids, as the acids accelerate the conversion to ortho-phosphoric acid. O-phosphoric acid is very different chemically from meta. Furthermore, water slowly causes this conversion as well. Ethanol should dissolve meta-phosphoric acid quicker than water, and should be a more stable solution for retaining the meta form.
thx for sharing your info. i ended up using heat to solubilize the substance bc after using the mortar to powderize the crystals it never completely dissolved under cold conditions. i left it in a 4 c unit overnight under a high spin and barely anything dissolved. i wanted to avoid alcohol bc i worried about its effect on my analysis. however, a mild heat treatment w/ a fairly fast spin did the trick. once solubilized, it remained solubilized in the fridge.
We bought meta-phosphoric acid last week, we made small pieces of crystals and we tried to solubilize it in ethanol (96%) with agitation but nothing has been dissolved. Could you help us? How did you dissolve it exactly? Thank you very much.
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