Assertion: phosphoric acid | /r/HasProperty | based on equilibrium considerations
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text: Typically, a phosphoric acid, which contains such impurities, even when concentrated to as much as 63% P 2 O 5 , will not spontaneously nucleate within a reasonable time at temperatures as low as -40° C. Based on equilibrium considerations, such an acid should begin to crystallize at about 5° C. to 20° C.