Balancing Chemical Equations

The video tutorial demonstrates how to balance the chemical equation Ca + HCl = CaCl2 + H2. It begins by counting the atoms on both sides of the equation, identifying the need to balance hydrogen and chlorine atoms. By adding coefficients, the equation is balanced, resulting in CaCl2 and H2 as products. The tutorial concludes with a summary of the balanced equation.

What is the initial number of hydrogen atoms on the reactant side of the equation?

• Three

• Two

• One

• Four

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

• One

• Two

• Three

• Four

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

• Four

• Three

• Two

• One

After balancing, how many chlorine atoms are there on the reactant side?

• Three

• Two

• One

• Four

What is the final balanced chemical equation?

• Ca + HCl → CaCl2 + H2

• Ca + 2HCl → CaCl2 + H2

• Ca + HCl → CaCl + H2

• Ca + 2HCl → CaCl + H2

What are the products formed in the balanced equation?

• Calcium oxide and water

• Calcium fluoride and hydrogen gas

• Calcium carbonate and oxygen

• Calcium chloride and hydrogen gas