According to a recent experiment I performed, the concentratiion of phosphoric acid in Coke Zero is 2.338 x 10^-3 moles/L. A can is 240 mL => 1 can contains about 0.0550 grams H3PO4
I contacted coke about this and here is what they said:
A 250 mL serving of Coca-Cola Classic contains 45 mg of phosphorus. The amount
of phosphoric acid is proprietary.Â
Looked at another...