Only very pure phosphoric acid is used in food products. An older term for soft drinks is phosphates. This name was applied because pure phosphoric acid was used to produce a tart taste in some beverages and to help dissolve the other ingredients.
(a) What is the pH of a solution that is known to be 5.58 M in H3PO4?
(b) What would be the approximate concentration of PO43-(aq) in that solution?