Balancing Chemical Reactions and Compounds

The video tutorial explains how silver tarnishes when exposed to hydrogen sulfide in the air, forming silver sulfide. It demonstrates a single displacement reaction using aluminum to clean tarnished silver. The process involves balancing the chemical equation for the reaction, ensuring the number of atoms for each element is equal on both sides. The tutorial concludes with a balanced equation for the reaction between silver sulfide and aluminum.

What is the chemical formula for tarnished silver?

• AgCl

• AgNO3

• Ag2S

• Ag2O

Which gas in the air reacts with silver to form tarnish?

• H2S

• CO2

• O2

• N2

What type of reaction is used to clean tarnished silver?

• Synthesis

• Double displacement

• Single displacement

• Combustion

In the reaction, what does aluminum combine with to form a new compound?

• Hydrogen

• Oxygen

• Sulfur

• Nitrogen

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

• Two

• Three

• One

• Six

What is the coefficient placed in front of Ag2S to balance sulfur atoms?

• 4

• 3

• 2

• 1

How many silver atoms are there after balancing the equation?

• Six

• Eight

• Four

• Two

What coefficient is used for aluminum to balance the equation?

• 1

• 2

• 3

• 4

What is the final product formed with aluminum in the reaction?

• Aluminum oxide

• Aluminum nitrate

• Aluminum sulfide

• Aluminum chloride