1) 4 P + 5 O² ===> 2 P²O⁵
2) P²O⁵ + 3 H²O ===> 2 H³PO⁴
3) H³PO⁴ + 3 NaOH ===> Na³PO⁴ + 3 H²O
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1) 4 P + 5 O² ===> 2 P²O⁵
2) P²O⁵ + 3 H²O ===> 2 H³PO⁴
3) H³PO⁴ + 3 NaOH ===> Na³PO⁴ + 3 H²O