Question

Balance the following chemical equation Na+I2->NaI

Answer 1

Balanced equation : 2Na+I₂⇒2NaI

Further explanation

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

Reaction

Na+I₂⇒NaI

• Give coefficient :

aNa+bI₂⇒NaI

• Make an equation :

Na, left=a, right=1⇒a=1

I, left=2b, right=1⇒2b=1⇒b=0.5

Equation becomes :

Na+0.5I₂⇒NaI x 2

2Na+I₂⇒2NaI