Balancing Chemical Reactions and Equations

The video tutorial explains a single displacement reaction between nitric acid (HNO3) and magnesium (Mg). It describes how magnesium displaces hydrogen, forming magnesium nitrate (Mg(NO3)2) and hydrogen gas. The tutorial then guides viewers through the process of balancing the chemical equation, ensuring the number of atoms for each element is equal on both sides. The instructor, Dr. B, concludes with the balanced equation and thanks viewers for watching.

What type of reaction occurs between nitric acid and magnesium?

• Double displacement

• Single displacement

• Synthesis

• Decomposition

In the initial unbalanced reaction, what is the product formed along with hydrogen?

• MgH2

• Mg(NO3)2

• Mg2N3

• MgO

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

• Four

• Three

• Two

• One

What is the first step suggested to balance the nitrogen atoms?

• Add a coefficient of 3 to HNO3

• Add a coefficient of 2 to HNO3

• Add a coefficient of 2 to Mg

• Add a coefficient of 3 to Mg

After balancing, how many oxygen atoms are there on each side of the equation?

• Eight

• Six

• Four

• Three

What is the final balanced equation for the reaction between HNO3 and Mg?

• 2HNO3 + Mg → MgO + H2

• HNO3 + Mg → MgO + H2

• HNO3 + Mg → Mg(NO3)2 + H2

• 2HNO3 + Mg → Mg(NO3)2 + H2