[MatthewJames]

I know phosphoric acid is a weak electrolyte and citric acid is strong but there's a lot of phosphoric acid in soda.

[Arkcon]

You seem to be jumping around with definitions here, you mention electrolytes, as in ions for conductivity.  Then you seem to focus only on acids in solution.  And I don't believe citric acid is a strong acid, and as weak acids go, phosphoric is stronger than organic acids.  However, a quick Goggle confirms that you're right, there's more acid in cola (pH ~ 2) than in orange juice (pH ~ 3)