Final answer:
Anions such as H2PO4- and Cl- typically do not react with each other in aqueous solutions as there are no cations present for them to form new compounds with.
Step-by-step explanation:
To predict the products of the reaction between H2PO4− and Cl−, we first note that these are both anions and typically, anions do not react with each other in aqueous solutions. However, if we are considering a double replacement reaction, we would usually see cations and anions "switch partners". Given that we only have anions present, no reaction is expected to occur because there is no cation for either anion to pair with to form a new compound. If there were corresponding cations in the solution, such as H+ and a metal cation, we could predict the formation of an acid and a metal phosphate, respectively. Nonetheless, as stated, with only the anions H2PO4− and Cl− present, no reaction would take place.