Write 4 equations for sodium phosphate.

This way you can get sodium phosphate:
6Na + 2H3 (PO4) = 3H2 + Na3 (PO4)
3Na2O + 2H3 (PO4) = 3H2O + Na3 (PO4)
3Na (OH) + H3 (PO4) = 3H2O + Na3 (PO4)
2Na (OH) + NaH2 (PO4) = 2H2O + Na3 (PO4)



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