Balancing Chemical Reactions – 4 EASY Steps

The video tutorial explains the importance of balancing chemical reactions, emphasizing the law of conservation of matter. It provides a detailed guide on balancing chemical equations through four simple steps. Two examples are demonstrated: one with a simple equation (Li + BR2 = LIBR) and another with a more complex equation (MGCL2 + AL2O3 = Alcl3 + Mgo). The tutorial highlights the importance of using coefficients to balance equations without altering subscripts.

Why is it important to balance chemical reactions?

• To increase the reaction speed

• To create new elements

• To change the chemical properties

• To ensure the conservation of mass

What is the first step in balancing a chemical equation?

• Change the subscripts of compounds

• Draw a table and label reactants and products

• List the elements present

• Add coefficients to balance elements

In the example Li + BR2 → LIBR, what coefficient is added to LIBR to balance bromine?

• 3

• 2

• 1

• 4

After balancing bromine in the equation Li + BR2 → LIBR, what needs to be done next?

• Add a coefficient to lithium on the left

• Change the subscript of bromine

• Remove lithium from the equation

• Add a coefficient to bromine on the left

In the reaction MGCL2 + AL2O3 → Alcl3 + Mgo, what is the least common multiple of chlorine atoms needed?

• 6

• 2

• 3

• 4

What coefficient is added to MGCL2 to balance chlorine in the reaction MGCL2 + AL2O3 → Alcl3 + Mgo?

• 4

• 1

• 3

• 2

How many magnesium atoms are on each side after balancing the equation MGCL2 + AL2O3 → Alcl3 + Mgo?

• 1

• 4

• 2

• 3