Question

Lập phương trình hóa học

a) Fe+ ? --> Fe₃O₄

b) KNO₃ -->KNO₂ + ?

c) Al + ? --> AlCl₃

d) Na₂O + ? --> NaOH

e) KClO₃ --> ? + O₂

Answer 1

a) \(3Fe+2O_2\rightarrow Fe_3O_4\)

b) \(2KNO_3\rightarrow2KNO_2+O_2\)

c)\(2Al+3Cl_2\rightarrow2AlCl_3\)

d) \(Na_2O+H_2O\rightarrow2NaOH\)

e) \(2KClO_3\rightarrow2KCl+3O_2\)

Answer 2

a) \(4Fe+3O_2->2Fe_2O_3\)

b)\(2KNO_3->2KNO_2+O_2\)

c)\(Al+3Cl->AlCl_3\)

d) \(Na_2O+H_2O->2NaOH\)

e)\(2KClO_3->2KCl+3O_2\)

Answer 3

a) 3Fe+ \(2O_2\) --> Fe₃O₄

b) KNO₃ -->KNO₂ + \(\frac{1}{2}O_2\)

c) Al + 3Cl --> AlCl₃

d) Na₂O + \(H_2O\) --> 2NaOH

e) 2KClO₃ --> 2KCl + 3O₂

Answer 4

a) 3Fe + 2O₂ -> Fe₃O₄

b) KNO₃ -> KNO₂ + \(\frac{1}{2}\)O₂

c) \(\frac{2}{3}\)Al + Cl₂ -> \(\frac{2}{3}\)AlCl₃

d) \(\frac{1}{2}\)Na₂O + \(\frac{1}{2}\)H₂O -> NaOH

e) 2KClO₃ -> 2KCl + 3O₂