Lithium Sulfide Chemical Properties

The video tutorial explains how to determine the chemical formula for lithium sulfide. It begins by identifying lithium and sulfur as components of the compound and explains that it is an ionic compound due to the presence of a metal and a nonmetal. The tutorial then demonstrates how to balance the charges of lithium (+1) and sulfur (-2) to achieve a net charge of zero, resulting in the formula Li2S. The crisscross method is introduced as a way to verify the formula, ensuring the correct subscripts are used. The video concludes with a summary of the process and the final formula.

What elements make up lithium sulfide?

• Sodium and sulfur

• Sodium and oxygen

• Lithium and oxygen

• Lithium and sulfur

Why is lithium sulfide considered an ionic compound?

• It is composed of a metal and a metalloid

• It is composed of two nonmetals

• It is composed of a metal and a nonmetal

• It is composed of two metals

What is the charge of a lithium ion?

• -2

• +1

• -1

• +2

How many lithium ions are needed to balance one sulfide ion?

• Four

• Three

• Two

• One

What is the correct chemical formula for lithium sulfide?

• Li2S

• Li2S2

• LiS

• LiS2

What method can be used to verify the formula of lithium sulfide?

• The elimination method

• The crisscross method

• The balancing method

• The substitution method