Penjelasan:

Penyetaraan reaksi

menggunakan cara aljabar

Nomor 1 :

C(s) + O2(g) => CO(g)

(a)C + (b)O2 => (c)CO

..

C : a = c

O : 2b = c

misal c = 1

a = c | 2b = c

a = 1 | 2b = 1

b = ½

a = 1, b = ½, c = 1 ....kalikan 2

a = 2, b = 1, c = 2

persamaan reaksi :

2C(s) + O2(g) => CO(g)

Nomor 2 :

Al(s) + O2(g) => Al2O2(g)

(a)Al + (b)O2 => (c)Al2O2

..

Al : a = 2c

O : 2b = 2c

misal c = 1

a = 2c | 2b = 2c

a = 2 | b = 1

a = 2, b = 1, c = 1

Persamaan reaksi :

2Al + O2 => Al2O2

Nomor 3 :

C2H5 + O2 => CO2 + H2O

(a)C2H5 + (b)O2 => (c)CO2 + (d)H2O

...

C : 2a = c

H : 5a = 2d

O : 2b = 2c + d

Misal a = 1

2a = c

c = 2

..

5a = 2d

5 = 2d

d = 5/2

..

2b = 2c + 2d

2b = 2(2) + 2(5/2)

2b = 4 + 5

2b = 9

b = 9/4

a = 1, b = 9/4, c = 2, d = 5/2 ....kalikan 4

a = 4, b = 9, c = 8, d = 10

Persamaan reaksi :

4C2H5 + 9O2 => 8CO2 + 10H2O