Answer:
1.5 eq. of charge are present.
Explanation:
In therms of charge, 1 equivalent of charge is defined as the moles of a monovalent ion (That is of charge +1 or -1) necessaries to neutralize the charge of the ion that we are studying.
In PO₄³⁻ ion there are 3 equivalents of charge per mole of PO₄³⁻. In 0.5 moles of this ion there are:
0.5 moles PO₄³⁻ * (3Eq. / 1 mol PO₄³⁻) =
1.5 eq. of charge are present.
