What formula represents strontium phosphate?

1 Answer
Mar 17, 2016

Answer:

#Sr_3(PO_4)_2#

Explanation:

The metal ion Strontium has an ionic charge of +2,

The polyatomic ion Phosphate has an ionic charge of -3, #PO_4^-3#

In order for the ionic molecule strontium phosphate to form a bond the charges need to be equal and opposite.

Therefore, we will need 3 strontium ions

#Sr^+2#
#Sr^+2#
#Sr^+2#

for a total ionic charge of +6
to bond with 2 phosphate ions

#PO_4^-3#
#PO_4^-3#

for a total ionic charge of -6

to form the molecule

#Sr_3(PO_4)_2#