Question

Câu 1 : Hoàn thành sơ đồ phản ứng

a , MnO₂ \(\rightarrow\)Cl₂\(\rightarrow\) HCl\(\rightarrow\)NaCl\(\rightarrow\)Cl₂\(\rightarrow\)H₂SO₄\(\rightarrow\)HCl

b , BaCl₂\(\rightarrow\)Cl₂\(\rightarrow\)HCl\(\rightarrow\)FeCl₂\(\rightarrow\)FeCl₃\(\rightarrow\)BaCl₂\(\rightarrow\)HCl

c , BaCl₂\(\rightarrow\)HCl\(\rightarrow\)CuCl₂\(\rightarrow\)KCl\(\rightarrow\)KOH\(\rightarrow\)KClO₃\(\rightarrow\)Cl₂

Answer 1

a) (1) MnO2 + 4 HCl(đặc) -to-> MnCl2 + Cl2 + 2 H2O

(2) Cl2 + H2 \(\Leftrightarrow\) 2 HCl

(3) HCl + NaOH -> NaCl + H2O

(4) 2 NaCl + 2 H2O -đpddcmnx-> 2 NaOH + H2 + Cl2

(5) Cl2 + 2 H2O + SO2 -> H2SO4 + 2 HCl

(6) H2SO4 + BaCl2 -> BaSO4 + 2 HCl

b)

(1) BaCl2 -điện phân nóng chảy nhiệt độ cao-> Ba + Cl2

(2) Cl2 + H2 \(\Leftrightarrow\) 2 HCl

(3) Fe + 2 HCl -> FeCl2 + H2

(4) 2 FeCl2 + Cl2 -to-> 2 FeCl3

(5) 2 FeCl3 + 3 Ba(OH)2 -> 2 Fe(OH)3 +3 BaCl2

(6) BaCl2 + H2SO4 -> BaSO4 + 2 HCl

c) (1) BaCl2 + H2SO4 -> BaSO4 +2 HCl

(2) 2 HCl + CuO -> CuCl2 + H2O

(3) CuCl2 + 2 KOH -> Cu(OH)2 + 2 KCl

(4) KCl + H2O -đpddcmnx-> KOH + 1/2 Cl2 + 1/2 H2

(5) 6 KOH + 3 Cl2 -to->5 KCl + KClO3 +3 H2O

(6) 2 KClO3 -to-> 2 KCl + 3 O2

Answer 2

a)

(1) MnO2 + 4HCl(đ) -to-> MnCl2 + Cl2 + 2H2O

(2) Cl2 + H2 <-as-> 2 HCl

(3) HCl + NaOH => NaCl + H2O

(4) 2NaCl + 2H2O -đpddcmn-> 2NaOH + H2 + Cl2

(5) Cl2 + 2H2O + SO2 => H2SO4 + 2HCl

(6) H2SO4 + BaCl2 => BaSO4 + 2HCl

b)

(1) BaCl2 -đpdd-> Ba + Cl2

(2) Cl2 + H2 2HCl (Đk : ánh sáng hoặc nhiệt độ)

(3) Fe + 2HCl => FeCl2 + H2

(4) 2FeCl2 + Cl2 -to-> 2FeCl3

(5) 2FeCl3 + 4Ba(OH)2 => 2Fe(OH)3 + 3BaCl2

(6) BaCl2 + H2SO4 => BaSO4 + 2HCl

c)

(1) BaCl2 + H2SO4 => BaSO4 +2HCl

(2) 2HCl + CuO => CuCl2 + H2O

(3) CuCl2 + 2KOH => Cu(OH)2 + 2KCl

(4) 2KCl + 2H2O -đpddcmn-> 2KOH + Cl2 + H2

(5) 6KOH + 3Cl2 -to-> 5KCl + KClO3 +3H2O

(6) 2KClO3 -to-> 2KCl + 3O2