Balancing Equations

Question 1

What are the three rules for balancing equations?

Answer 1

Always balance an equation using coefficients.
If there is a compound ion (e.g. S04), balance it as if it is one atom.
Always balance hydrogen 2nd last and oxygen dead last.

Question 2

Complete these examples for balancing equations.
1. KCl03 - KCl + 02
2. NH3 + Cl2 - N2 + HCl
3. K + 02 - K20
4. K0H + H2S04 - K2S04 + H20

Answer 2

1. 2KCl03 - 2KCl + 302
2. 2NH3 + 3Cl2 - N2 + 6HCl
3. 4K + 02 - 2K20
4. 2K0H + H2S04 - K2S04 + 2H20

Question 3

Complete the following word equations.
1. Barium + Water - Barium Hydroxide + Hydrogen
2. Nitrogen + Oxygen - Nitrogen Trioxide
3. Carbon Dioxide + Barium Hydroxide - Barium Carbonate + Water

Answer 3

1. Ba + 2H20 - Ba(0H)2 + H2
2. N2 + 302 - 2N03
3. C02 + Ba(0H)2 - BaCO3 + H20