Balancing Chemical Equations

The video tutorial demonstrates how to balance the chemical equation of silver nitrate and magnesium bromide. It begins by counting the atoms on both sides of the equation, focusing on the polyatomic nitrate ion. The tutorial then guides viewers through balancing bromine atoms by adjusting coefficients and continues with balancing silver and nitrate ions. The process is simplified by treating the nitrate ion as a single unit, leading to a balanced equation. The video concludes with a summary of the steps taken to achieve balance.

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

• Two

• One

• Four

• Three

Why is the NO3 ion counted as a single unit in the balancing process?

• Because it is a polyatomic ion that remains unchanged

• Because it is a metal

• Because it is a gas

• Because it is a liquid

How many bromine atoms are present on the reactant side before balancing?

• One

• Two

• Three

• Four

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

• Three

• Two

• One

• Four

After balancing bromine, how many silver atoms are on the product side?

• Two

• Three

• Four

• One

What coefficient is used in front of AgNO3 to balance the silver atoms?

• Two

• Four

• One

• Three

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

• Three

• Two

• One

• Four

What is the final balanced equation for the reaction between silver nitrate and magnesium bromide?

• AgNO3 + MgBr2 → AgBr + Mg(NO3)2

• 2AgNO3 + MgBr2 → AgBr + Mg(NO3)2

• AgNO3 + MgBr2 → 2AgBr + Mg(NO3)2

• 2AgNO3 + MgBr2 → 2AgBr + Mg(NO3)2