Question

Hoàn Thành sơ đồ phản ứng ><
a) ?Na + O_{2 ^{- - -> ?}} Na₂O
b) KOH + FeCl₂ - - -> Fe(OH)₂ + ?KCl
c) ?Al + ? Al₂O₃
d) Na₂CO₃ + ?HCl - - -> ?NaCl + H₂O + CO₂

Answer 1

a/ 4Na + O₂ ===> 2Na₂O

b/ 2KOH + FeCl₂ ===> Fe(OH)₂ + 2KCl

c/ 4Al + 3O₂ ===> 2Al₂O₃

d/ Na₂CO₃ + 2HCl ===> 2NaCl + CO₂ + H₂O

Answer 2

a) 4Na + O₂ - - -> 2 Na₂O
b)2 KOH + FeCl₂ - - -> Fe(OH)₂ + 2KCl
c) Chưa đủ dữ kiện
d) Na₂CO₃ + 2HCl - - -> 2NaCl + H₂O + CO₂

@Pham Van Tien