Balancing Chemical Equations

The video tutorial explains how to balance the chemical equation K2CO3 + CaCl2. It begins by counting the atoms on both sides of the equation, identifying that potassium and chlorine are unbalanced. By adding a coefficient of two in front of KCl, the equation is balanced, resulting in equal numbers of each type of atom on both sides. The tutorial concludes with a summary of the balanced equation.

What is the initial number of potassium atoms on the reactant side of the equation K2CO3 + CaCl2?

• Two

• Three

• One

• Four

Which atoms are initially unbalanced in the equation K2CO3 + CaCl2?

• Potassium and Chlorine

• Carbon and Oxygen

• Calcium and Carbon

• Oxygen and Calcium

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

• Three

• Two

• One

• Four

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

• Four

• Three

• Two

• One

What is the final balanced equation for the reaction between potassium carbonate and calcium chloride?

• K2CO3 + CaCl2 → 2KCl + CaCO3

• K2CO3 + 2CaCl2 → KCl + CaCO3

• 2K2CO3 + CaCl2 → KCl + 2CaCO3

• K2CO3 + CaCl2 → KCl + CaCO3