This document contains examples of chemical equations that show reactants reacting to form products through balancing chemical equations. The examples demonstrate balancing elements and polyatomic ions by changing only the coefficients in front of the formulas. Key principles shown are the law of conservation of matter, identifying diatomic elements, and using coefficients to balance chemical equations.

1. H₂ + O₂ → H₂O₁
Law of Conservation of
Matter- Matter cannot be
created or destroyed
Reactants Product(s)Reacts to Form
Reactants Products
H:2 4 H:2 4
O:2 O:1 2
The only number you can change
is the coefficient.
2 2
Monday, June 2, 14

2. _Al + _H₂(SO₄) → _Al₂ (SO₄)₃ + _H₂
If a polyotomic appears
on both sides, we
balance it as one.
Reactants Products
SO₄ :1 3 SO₄:3
Al:1 2 Al:2
H:2 6 H:2 6
3 32 1
Diatomic:
-Hydrogen
-Nitrogen
-Oxygen
-Florine
-Chlorine
-Bromine
-Iodine
Monday, June 2, 14

3. Aluminum and Oxygen react to form
Aluminum Oxide.
_Al + _O₂ → _Al₂_O₃
Reactants Products
Al: 1 4 Al: 2 4
O: 2 6 O: 3 6
3 24
Monday, June 2, 14

4. Potassium Chlorate decomposes to form potassium
chloride and oxygen gas.
_K(CIO₃) → _K(Cl) + _O₂
Reactants Products
K: 1 2 K: 12
Cl: 12 Cl: 12
O: 3 6 O: 2 6
32 2
Monday, June 2, 14

5. Aluminum Nitrate and Sodium Hydroxide React to from Aluminum Hydroxide and
Sodium Nitrate.
Al+³
NO-¹₃
Na +¹
OH -¹
Al(NO₃)₃ + _NaOH →Al(OH)₃ + _NaNO₃
Reactants Products
Al: 1 Al:1
NO₃: 3 NO₃: 13
Na:1 3 Na:13
OH: 1 3 HO:3
33
Monday, June 2, 14