What is the molecular formula of sodium phosphate?

1 Answer
Trevor Ryan.
Dec 22, 2015

Na_3PO_4

Explanation:

This is so since sodium is in group 1 so has a valency of 1+ while phosphate is a polyatomic ion of valency 3- and thus we need 3 sodium atoms for each 1 phosphate ion, hence, Na_3PO_4.
Overall nett charge of molecule must be zero.

The ions will be held together by strong ionic bonds and the molecules by strong coulombic forces of attraction.

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