Balancing Chemical Equations Concepts

The video tutorial explains how to balance a chemical equation involving sulfur and sodium to form sodium sulfide. It begins by counting the atoms on each side of the equation, identifying the imbalance, and then adjusting the coefficients to achieve balance. The tutorial emphasizes the importance of not changing subscripts and concludes with a balanced equation.

What is the first step in balancing a chemical equation?

• Change the subscripts of the compounds.

• Count the atoms on each side of the equation.

• Remove products from the equation.

• Add more reactants to the equation.

In the given equation, how many sulfur atoms are present on each side initially?

• No sulfur atoms on the reactant side.

• One sulfur atom on each side.

• Three sulfur atoms on the product side.

• Two sulfur atoms on each side.

What is the purpose of using coefficients in a chemical equation?

• To decrease the number of reactants used.

• To increase the number of products formed.

• To balance the number of atoms on both sides of the equation.

• To change the chemical properties of the compounds.

Why can't subscripts be changed when balancing a chemical equation?

• Because they represent the number of molecules.

• Because they are fixed by the chemical formula.

• Because they are used to balance the equation.

• Because they determine the state of matter.

After balancing, how many sodium atoms are present on each side of the equation?

• Four sodium atoms on each side.

• Three sodium atoms on each side.

• Two sodium atoms on each side.

• One sodium atom on each side.

What is the final balanced equation for sulfur plus sodium?

• S + Na → NaS

• S + Na2 → Na2S

• S + 2Na → Na2S

• 2S + Na → Na2S