Question

Na2CO3+HCl-
NaOH+HCl-
Fe (OH)3+HNO3-
Mg+H2SO4-

Answer 1

1) Na₂CO₃ + 2HCl = 2NaCl + H₂O + CO₂↑
2) NaOH+HCl = NaCl + H₂O
3) Fe(OH)₃ + 3HNO₃ = Fe(NO₃)₃ + 3H₂O
4) Mg + H₂SO₄ = MgSO₄ + H₂↑