The reaction already balanced
Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:
• 1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.
• 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product
• 3. Select the coefficient of the substance with the most complex chemical formula equal to 1
For gas combustion reaction which is a reaction of hydrocarbons with oxygen produces CO₂ and H₂O (water vapor). can use steps:
Balancing C, H and the last O
Reaction
KOH (aq) + HNO₃ (aq) ⇒ KNO₃ (aq) + H₂0 (l)
aKOH (aq) + bHNO₃ (aq) ⇒ KNO₃ (aq) + cH₂0 (l)
K : left = a, right = 1⇒a=1
N : left = b, right =1, b=1
H: left = a, right a+b=2c⇒1+1=2c⇒2=2c⇒c=1
KOH (aq) + HNO₃ (aq) ⇒ KNO₃ (aq) + H₂0 (l)⇒ already balanced
