[P:1](=[O:5])([OH:4])([OH:3])[OH:2].[O-]P(=O)=O.[K+].[P:11]([O-:15])([O-:14])([O-:13])=[O:12]>>[P:1](=[O:2])([OH:5])([OH:4])[OH:3].[P:11]([O-:15])([O-:14])([O-:13])=[O:12]To 190 g of 85% phosphoric acid was added 30 g of potassium polymetaphosphate. The acid was warmed until the phosphate dissolved, then was cooled to room temperature to obtain a clear, syrupy, phosphoric acid-phosphate solution.
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