Question

Hoàn thành chuỗi biến hóa sau:

a) \(S\rightarrow SO_2\rightarrow SO_3\rightarrow H_2SO_4\rightarrow Na_2SO_4\rightarrow BaSO_4\)

b) \(Ca\rightarrow CaO\rightarrow Ca\left(OH\right)_2\rightarrow CaCO_3\rightarrow CaSO_4\rightarrow CaCl_2\)

Answer 1

a) \(S+O2\rightarrow SO2\)

2SO2+O2---->2SO3

SO3+H2O--->H2SO4

H2SO4+Na2O---->Na2SO4+H2O

Na2SO4+BaCl2---->2NaCl+BaSO4

b) 2Ca+O2--->2CaO

CaO+H2O--->Ca(OH)2

Ca(OH)2+CO2---->CaCO3+H2O

CaCO3+H2SO4----> CaSO4+H2O+CO2

CaSO4+BaCl2--->CaCl2+BaSO4

Answer 2

a,

\(1.\text{O2 + S → SO2}\)

\(2.\text{O2 + 2SO2 ↔ 2SO3}\)

\(3.\text{H2O + SO3 → H2SO4}\)

\(3.\text{H2SO4 + 2NaOH → 2H2O + Na2SO4}\)

\(4.\text{BaCl2 + Na2SO4 → 2NaCl + BaSO4}\)

b,

\(1.2Ca+O2\rightarrow2CaO\)

\(2.\text{CaO + H2O → Ca(OH)2}\)

\(3.\text{Ca(OH)2 + CO2 → CaCO3 + H2O}\)

\(4.\text{CaCO3 + H2SO4 → H2O + CO2 + CaSO4}\)

\(5.\text{BaCl2 + CaSO4 → CaCl2 + BaSO4}\)

Answer 3

https://i.imgur.com/Vnj6tB8.jpg