Balancing Combustion Reactions

The video tutorial explains how to balance a combustion reaction equation involving C6H12O2 and O2. It begins by counting the atoms of carbon, hydrogen, and oxygen, highlighting common mistakes in counting oxygen atoms. The tutorial then demonstrates balancing the carbon and hydrogen atoms first, followed by the oxygen atoms, emphasizing the importance of leaving oxygen balancing until last. The video concludes by identifying the reaction as an organic combustion reaction, resulting in carbon dioxide and water.

What is the first step in balancing a combustion reaction equation?

• Add coefficients to water molecules first.

• Balance the carbon atoms first.

• Count the oxygen atoms first.

• Balance the hydrogen atoms first.

Which element's atoms are counted incorrectly most often in combustion reactions?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon

Why is it recommended to leave oxygen atoms to be balanced last?

• Because they do not affect the balance of carbon and hydrogen.

• Because they are the most abundant.

• Because they are the easiest to balance.

• Because changing their coefficient affects other atoms.

How many carbon atoms are there in the reactant C6H12O2?

• 12

• 4

• 6

• 8

What coefficient is used for H2O to balance the hydrogen atoms?

• 7

• 6

• 5

• 4

After balancing hydrogen, what is the total number of oxygen atoms needed?

• 20

• 18

• 22

• 16

What is the final coefficient for O2 to balance the equation?

• 9

• 8

• 7

• 6

What type of reaction is C6H12O2 + O2 resulting in CO2 and H2O?

• Combustion reaction

• Single replacement reaction

• Decomposition reaction

• Synthesis reaction

What are the products of the combustion reaction discussed?

• Carbon dioxide and water

• Carbon dioxide and hydrogen

• Carbon monoxide and hydrogen

• Carbon monoxide and water

What is the main characteristic of an organic combustion reaction?

• It involves a hydrocarbon and oxygen.

• It produces carbon monoxide and water.

• It involves a metal and oxygen.

• It produces hydrogen gas.