Question 11A.CQ.7: How is pyrophosphoric acid related to orthophosphoric acid?...
How is pyrophosphoric acid related to orthophosphoric acid?
Step-by-Step
Pyrophosphoric acid (H_4P_2O_7) is the anhydride of orthophosphoric acid (H_3PO_4) and is obtained by the removal of a molecule of water from two molecules of H_3PO_4 as shown below:
2 H _3 PO _4\quad \xrightarrow{527\ K }\quad H _4 P _2 O _7+ H _2 O
Orthophosphoric Pyrophosphoric
acid acid
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