Question

[Nguyễn Trần Nhật Khang]

 Hãy cân bằng các phương trình hóa học sau: (3,0 điểm)

                 a/        Fe      +    O2             Fe3O4

                 b/        P        +    O2             P2O5

                 c/        Na      +    O2             Na2O

                 d/       Al       +     HCl          AlCl3     +     H2

                 e/        C2H4   +     O2            CO2      +     H2O

                 f/        Fe(OH)3    +     H2SO4          Fe2(SO4)3   +    H2O   

Answer 1

[Nguyễn Hoàng Minh]

$a)3Fe+2O_2\xrightarrow{t^o}Fe_3O_4$

$b)4P+5O_2\xrightarrow{t^o}2P_2O_5$

$c)4Na+O_2\xrightarrow{t^o}2Na_2O$

$d)2Al+6HCl\to 2AlCl_3+3H_2\uparrow$

$e)C_2H_4+3O_2\xrightarrow{t^o}2CO_2\uparrow+2H_2O$

$f)2Fe(OH)_3+3H_2SO_4\to Fe_2(SO_4)_3+6H_2O$

Answer 2

[Tô Mì]

a. \(6Fe+4O_2\rightarrow2Fe_3O_4\)

b. \(4P+5O_2\rightarrow2P_2O_5\)

c. \(4Na+O_2\rightarrow2Na_2O\)

d. \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

e. \(C_2H_4+2O_2\rightarrow CO_2+2H_2O\)

f. \(2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)