The polyatomic ion known as the diphosphate ion is an important intermediate formed in metabolic processes. If the ionic compound calcium diphosphate has the formula Ca 2P 2O 7, which of the following correctly represents the symbol for the diphosphate ion?A) P2O74−
B) P2O714−
C) PO4+
D) P2O72−
E) PO2−

The symbol of diphosphate ion is

Explanation:

An ionic compound is defined as the compound which is formed when electron gets transferred from one atom to another atom.

These are usually formed when a metal reacts with a non-metal or a metal reacts with a polyatomic ion or a reaction between two polyatomic ions takes place.

Calcium diphosphate is formed by the combination of calcium ions and diphosphate ions

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral ionic compound.

Hence, the symbol of diphosphate ion is

pure substance: iron,copper

impure substance: water,charcoal