Question

[Laura Nguyễn]

Viết PT ở sơ đồ sau:

a) Mg -> MgO -> MgCl₂ -> Mg(OH)₂ + MgSO₄

b) Al -> Al₂O₃ -> AlCl₃

↓

Al (OH)₃ -> Al₂O₃

Answer 1

[B.Thị Anh Thơ]

a,

\(1.\text{2Mg + O2 → 2MgO}\)

\(2.\text{2HCl + MgO → H2O + MgCl2}\)

\(3.\text{2NaOH + MgCl2 → Mg(OH)2 + 2NaCl }\)

\(4.\text{H2SO4 + Mg(OH)2 → 2H2O + MgSO4}\)

b,

\(1.\text{4Al(bột)+3O2=2Al2O3}\)

\(2.\text{Al2O3 + 6HCl → 2AlCl3 + 3H2O}\)

\(3.\text{AlCl3 + 3NaOH → Al(OH)3 + 3NaCl}\)

\(4.\text{2Al(OH)3=Al2O3+3H2O}\)

Answer 2

[Lê Thu Dương]

a) 2Mg+O2--->2MgO

MgO+2HCl---->MgCl2+H2

MgCl2+2NaOH---->2NaCl+Mg(OH)2

Mg(OH)2+ CuSO4---->Cu(OH)2+MgSO4

b)4 Al+3O2--->2Al2O3

Al2O3+6HCl----->2AlCl3+3H2O

AlCl3+3NaOH---->Al(OH)3+3NaCl

2Al(OH)3---->Al2O3+3H2O