Question

Viết PTHH thực hiện chuỗi biến hóa sau:

a) Kali -> Kali oxit-> Kali hidroxit-> Kali cacbonat-> Kali clorua

b) Cu -> CuO -> CuSO4 -> Cu(OH)2 -> CuO -> Cu

c) FeS2 -> Fe2O3 -> Fe -> FeCl3 ->Fe(OH)3 -> Fe2(SO4)3

d) Fe -> FeCl3-> Fe (OH)3 -> Fe2O3

Fe-> FeCl2 -> Fe(OH)2 -> Fe(NO3)2

Answer 1

c) 4FeS2+ 11O2--->8SO2 +2Fe2O3

Fe2O3+3H2--->2Fe+3H2O

2Fe +6HCl--->2FeCl3 +3H2

FeCl3+3NaOH--->Fe(OH)3+ 3NaCl

2Fe(OH)3 +3H2SO4---->Fe2(SO4)3 +3H2O

d)2 Fe +6HCl-->2FeCl3+3H2

FeCl3 + 3NaOH--->Fe(OH)3 +3NaCl

2Fe(OH)3 --->Fe2O3 +3H2O

e) Fe +2HCl---.FeCl2 +H2

FeCl2+2NaOH---->Fe(OH)2 +2NaCl

Fe(OH)2 +2AgNO3---> Fe(NO3)2 +2AgOH

Chúc bạn học tốt

Nhớ tích cho mình nhé

Answer 2

a) 4K+ O2--->2K2O

K2O+H2O-------->.2KOH

KOH+ NaCO3--->K2CO3+NaOH

K2CO3+2HCl---->2KCl+H20+CO2

B) 2Cu+O2---->2CuO

CuO+H2SO4---->CuSO4+ H2O

CuSO4+ 2NaOH--->Cu(OH)2 +Na2SO4

Cu(OH)2----->CuO+H2O

2CuO--->2Cu+O2

Chúc bn học tốt