Balancing a Chemical Equation
Introduction to Balancing a Chemical Equation
By selecting the right coefficient for every molecule that provides an equal number of each type of atoms on both sides of the equation.
However, a balanced equation should contain the smallest possible whole number coefficients.
Example: Burning of Methane in air
CH4 + O2 → CO2 + H2O This is an unbalanced equation
So, we need to balance the equation. To do that we look at the number of atoms of each kind in each side of the equation, and change their coefficients accordingly,
So, the corresponding balanced equation is: CH4 + 2O2 → CO2 + 2H2O
|Type of atom||In||Out||What should be
Symbols such as s (solid), l (liquid)and g (gas), may be used to show the physical state of the substance involved in the reaction.
Conditions such as heat (shown as Δ) maybe also shown on the right arrow.
CH4 (g) + 2O2 (g) →Δ CO2 (g) + 2H2O (g)
Exercise: Balance the following chemical reactions:
Exercise on Balancing Chemical Reactions
Check your answers here:
Solution to the Exercise on Balancing Chemical Reactions
For more details, please contact me here.
Date of last modification: Summer , 2019