Balancing Chemical Equations and Atoms

The video tutorial explains how to balance the chemical equation NaH + H2O yields NaOH + H2. It involves counting the number of atoms on both the reactant and product sides to ensure they are equal, thus confirming the equation is balanced. The tutorial also highlights common mistakes, such as miscounting hydrogen atoms, and provides a final balanced equation for sodium hydride reacting with water to produce sodium hydroxide and hydrogen gas.

What is the initial chemical equation that needs to be balanced?

• NaOH + H2 yields NaH + H2O

• NaCl + H2O yields NaOH + HCl

• NaH + O2 yields NaOH + H2

• NaH + H2O yields NaOH + H2

How many hydrogen atoms are present on the reactant side of the equation?

• One

• Two

• Three

• Four

On the product side, how many sodium atoms are there?

• One

• Two

• Four

• Three

What is a common mistake when counting hydrogen atoms on the product side?

• Ignoring the water molecule

• Counting sodium atoms as hydrogen

• Forgetting the two hydrogen atoms in H2

• Counting the oxygen atoms instead

What is the balanced equation for sodium hydride and water?

• NaCl + H2O yields NaOH + HCl

• NaOH + H2 yields NaH + H2O

• NaH + O2 yields NaOH + H2

• NaH + H2O yields NaOH + H2