Balancing Chemical Reactions

The video tutorial explains how to balance the chemical equation involving sulfur dioxide (SO2) and lithium selenide (Li2Se). It begins by identifying the type of reaction as a double displacement reaction, where sulfur and lithium switch places. The tutorial then provides a detailed, step-by-step process for balancing the equation, focusing on balancing oxygen atoms last. The video concludes with a summary of the balanced equation and a brief mention of the reaction type.

What is the initial chemical equation that needs to be balanced?

• NH3 + O2

• H2O + NaCl

• SO2 + Li2Se

• CO2 + H2

What type of reaction involves the exchange of elements between two compounds?

• Decomposition

• Single Displacement

• Synthesis

• Double Displacement

In the balancing process, which element is suggested to be balanced last?

• Lithium

• Sulfur

• Oxygen

• Selenium

How many oxygen atoms are present after balancing the lithium oxide?

• 4

• 3

• 2

• 1

What is the coefficient placed in front of lithium oxide to balance the oxygen atoms?

• 1

• 4

• 3

• 2

After balancing, how many lithium atoms are there in the equation?

• 4

• 5

• 3

• 2

What is the final balanced equation for the reaction?

• SO2 + Li2Se → 2Li2O + Se

• SO2 + Li2Se → Li2O + SeO2

• SO2 + 2Li2Se → Li2O + Se

• 2SO2 + Li2Se → 2Li2O + Se