The balanced chemical equation for this reaction series is:
Zn + 2HCl → ZnCl2 + H2ZnCl2 + 2NaOH → Zn(OH)2 + 2NaClZn(OH)2 + 3H3PO4 → Zn3(PO4)2 + 6H2O
Overall reaction:
Zn + 2HCl + 2NaOH + 2H3PO4 → Zn3(PO4)2 + 2NaCl + 5H2O
The balanced chemical equation for this reaction series is:
Zn + 2HCl → ZnCl2 + H2
ZnCl2 + 2NaOH → Zn(OH)2 + 2NaCl
Zn(OH)2 + 3H3PO4 → Zn3(PO4)2 + 6H2O
Overall reaction:
Zn + 2HCl + 2NaOH + 2H3PO4 → Zn3(PO4)2 + 2NaCl + 5H2O