You would at least need to specify the anion - acetate? citrate? fumarate? And what kind of acid for the acidic solution?
Sorry not to be able to be more specific than that; most DMT salts are 'very soluble' in water, whatever that actually amounts too. It tends to mean that a drop or two of water will turn a small pile of whatever DMT salt into a blob of goo. This almost certainly the case for a solution ending up with a pH of 2 to 3 as well.
It's worth noting that many DMT salts are quite hygroscopic, the hydrochloride for example deliquescing to the extent of being exceedingly difficult to prepare in crystalline form at all.
If you find out any precise figures for any of this we'd all be very interested to hear.
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