Question

Write the missing compounds in the blank (some equation cannot react)

Na + .................. → Na2SO4 + H2
Zn + HNO3 → .................. + N2 + H2
Al2O3 + H¬3PO4 → .................. + H2O
K2O + HCl → .................. + H2O
KOH + HNO3 → .................. + H2O
Fe3O4 + HNO3 → .................. + .................. + NO + H2O
Ca(OH)2 + .................. → CaCl2 + H2O
CuO + H2SO4 → .................. + H2O
Fe + HBr → .................. + H2
ZnO + HCl → .................. + H2O
Ca + HCl → .................. + H2

Answer 1

Na + H2SO4 → Na2SO4 + H2

Zn + HNO3 → Zn(NO3)2 + N2 + H2

Al2O3 + H3PO4 → AlPO4 + H2O

K2O + 2HCl → 2KCl + H2O

KOH + HNO3 → KNO3 + H2O

Fe3O4 + 8HNO3 → 3Fe(NO3)2 + 2NO + 4H2O

Ca(OH)2 + 2HCl → CaCl2 + 2H2O

CuO + H2SO4 → CuSO4 + H2O

Fe + 2HBr → FeBr2 + H2

ZnO + 2HCl → ZnCl2 + H2O

Ca + 2HCl → CaCl2 + H2