Balancing Chemical Equations and Ions

This video tutorial demonstrates how to balance the chemical equation AgNO3 + CaBr2. It begins by identifying the atoms involved and recognizing the nitrate ion as a polyatomic ion that remains unchanged on both sides of the equation. The tutorial then proceeds to balance the bromine and silver atoms by adjusting coefficients, ensuring that the number of atoms on both sides is equal. The video concludes with a balanced equation and emphasizes the importance of treating polyatomic ions as single units to simplify the balancing process.

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

• One

• Two

• Four

• Three

Why can nitrate be treated as a single unit during the balancing process?

• Because it appears on both sides of the equation

• Because it is a metal

• Because it is a liquid

• Because it is a gas

What coefficient is placed in front of AgBr to balance the bromine atoms?

• 4

• 1

• 2

• 3

How many silver atoms are there on the product side after balancing?

• One

• Two

• Four

• Three

What is the coefficient placed in front of silver nitrate to balance the equation?

• 3

• 4

• 2

• 1

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 between AgNO3 and CaBr2?

• AgNO3 + CaBr2 → AgBr + Ca(NO3)2

• AgNO3 + 2CaBr2 → AgBr2 + Ca(NO3)2

• 2AgNO3 + CaBr2 → 2AgBr + Ca(NO3)2

• 2AgNO3 + CaBr2 → AgBr + 2Ca(NO3)2