Balancing Chemical Equations

The video tutorial explains how to balance a chemical equation involving sodium carbonate and calcium chloride. It begins by counting the atoms on each side of the equation, identifying the imbalance in sodium and chlorine atoms. A coefficient is added to balance these atoms, resulting in a balanced equation. The tutorial concludes with a summary of the balanced equation.

What are the initial counts of sodium and chlorine atoms on the reactant side of the equation?

• Two sodium and two chlorine atoms

• One sodium and one chlorine atom

• Two sodium and one chlorine atom

• One sodium and two chlorine atoms

What is the purpose of adding a coefficient in front of NaCl in the equation?

• To increase the number of calcium atoms

• To balance the number of sodium and chlorine atoms

• To balance the number of carbon atoms

• To decrease the number of oxygen atoms

After adding the coefficient, what is the new count of sodium atoms on the product side?

• Four sodium atoms

• Two sodium atoms

• Three sodium atoms

• One sodium atom

What is the final step to ensure the chemical equation is balanced?

• Add a coefficient to calcium carbonate

• Remove excess oxygen atoms

• Ensure all atom counts are equal on both sides

• Add more calcium atoms

What is the final balanced equation for the reaction?

• Na2CO3 + CaCl2 → NaCl + CaCO3 + O2

• Na2CO3 + CaCl2 → 2NaCl + CaCO3 + O2

• Na2CO3 + CaCl2 → NaCl + CaCO3

• Na2CO3 + CaCl2 → 2NaCl + CaCO3