Balancing Chemical Equations

In this video, Dr. B demonstrates how to balance the chemical equation KI + Cl2, which involves potassium iodide and chlorine gas. The process begins with counting the atoms of each element involved. Initially, the iodine and chlorine atoms are unbalanced. By adjusting coefficients, Dr. B balances the iodine atoms first, followed by potassium and chlorine. The final balanced equation is KI + Cl2 yields KCl + I2. The video concludes with a summary of the balanced equation.

What is the initial number of chlorine atoms on the reactant side in the equation involving KI and Cl2?

• Two

• Three

• Four

• One

Which element's atoms are first balanced by changing the coefficient of KI?

• Iodine

• Oxygen

• Chlorine

• Potassium

What is the coefficient of KI after balancing the iodine atoms?

• 1

• 2

• 3

• 4

What is the next step after balancing the iodine atoms in the equation?

• Balancing the chlorine atoms

• Balancing the hydrogen atoms

• Balancing the potassium atoms

• Balancing the oxygen atoms

What coefficient is used for KCl to balance the equation?

• 4

• 3

• 2

• 1

What is the final balanced chemical equation for KI and Cl2?

• KI + 2Cl2 → KCl + 2I2

• 2KI + 2Cl2 → 2KCl + 2I2

• KI + Cl2 → KCl + I2

• 2KI + Cl2 → 2KCl + I2