Balancing Chemical Equations and Nitrate Ions

In this video, Dr. B demonstrates how to balance the chemical equation CuO + HNO3, involving copper(II) oxide and nitric acid. The process includes counting atoms, recognizing the nitrate ion as a polyatomic ion, and using it to simplify balancing. By adjusting coefficients, the equation is balanced, ensuring equal numbers of each type of atom on both sides. The video emphasizes the importance of treating the nitrate ion as a single unit to simplify the balancing process.

What are the reactants in the chemical equation discussed in the video?

• Cu and NO3

• Cu and H2O

• CuO and HNO3

• CuO and H2

What is the significance of the nitrate ion in the equation?

• It remains unchanged and is treated as a single unit.

• It changes into a different ion during the reaction.

• It breaks down into separate atoms.

• It is not involved in the reaction.

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

• Three

• Four

• Two

• One

What adjustment is made to balance the hydrogen atoms in the equation?

• Add a coefficient of 3 in front of CuO

• Add a coefficient of 2 in front of CuO

• Add a coefficient of 2 in front of HNO3

• Add a coefficient of 3 in front of HNO3

How many nitrate ions are present on the product side after balancing?

• Four

• Three

• One

• Two

What is the final balanced equation for the reaction?

• CuO + 2HNO3 → Cu(NO3) + H2O

• CuO + HNO3 → Cu(NO3)2 + H2O

• CuO + 2HNO3 → Cu(NO3)2 + H2O

• CuO + HNO3 → Cu(NO3) + H2O

Why is it easier to balance the equation by treating the nitrate group as a single entity?

• It reduces the number of atoms to count.

• It simplifies the balancing process.

• It increases the reaction rate.

• It changes the chemical properties.

Who is the presenter of the video?

• Dr. B

• Dr. D

• Dr. A

• Dr. C