Balancing Chemical Equations Practice

The video tutorial explains how to balance the chemical equation CaCO3 + HCl yields CaCl3 + CO2 + H2O. It begins by counting the atoms on both sides of the equation, noting the presence of calcium, carbon, oxygen, hydrogen, and chlorine. The tutorial emphasizes the importance of distinguishing between different elements, such as chlorine and carbon. To balance the equation, a coefficient of two is added in front of HCl, ensuring equal numbers of hydrogen and chlorine atoms on both sides. The final balanced equation is presented, demonstrating the reaction of calcium carbonate with hydrochloric acid to produce calcium chloride, carbon dioxide, and water.

What is the initial chemical equation discussed in the video?

• CaCO3 + HCl yields CaCl + CO2 + H2O

• CaCO3 + HCl yields CaCl3 + CO2 + H2O

• CaCO3 + HCl yields CaCl4 + CO2 + H2O

• CaCO3 + HCl yields CaCl2 + CO2 + H2O

Which element is mistakenly counted as having only one atom on the reactant side?

• Hydrogen

• Oxygen

• Carbon

• Calcium

How many oxygen atoms are present on the product side before balancing?

• One

• Two

• Four

• Three

What coefficient is added in front of HCl to balance the equation?

• One

• Two

• Three

• Four

What is the final balanced equation for the reaction?

• CaCO3 + HCl yields CaCl3 + CO2 + H2O

• CaCO3 + 2HCl yields CaCl3 + CO2 + H2O

• CaCO3 + HCl yields CaCl2 + CO2 + H2O

• CaCO3 + 2HCl yields CaCl2 + CO2 + H2O