Balancing Chromium Trioxide Reactions

The video tutorial explains how to balance the decomposition reaction of chromium trioxide (CrO3). It begins by identifying the type of reaction and counting the atoms in the reactants and products. The tutorial then attempts to balance the equation by adjusting the coefficients, focusing on achieving an even number of oxygen atoms. After several adjustments, the equation is successfully balanced, with a final review of the process. The video concludes with a summary of the balanced equation and the type of reaction.

What type of reaction is chromium trioxide undergoing in this video?

• Double Replacement

• Single Replacement

• Decomposition

• Synthesis

How many oxygen atoms are present in the reactants initially?

• Two

• Four

• Three

• Five

What is the first step taken to try and balance the equation?

• Add a coefficient of 3 to CrO3

• Add a coefficient of 2 to Cr2O3

• Add a coefficient of 2 to CrO3

• Add a coefficient of 4 to CrO3

What is the result of placing a coefficient of 2 in front of Cr2O3?

• It decreases the oxygen atoms to 4

• It increases the chromium atoms to 4

• It has no effect

• It balances the equation

What is the next step after balancing the chromium atoms?

• Add more chromium atoms

• Add a coefficient of 5 to CrO3

• Remove some oxygen atoms

• Adjust the oxygen atoms

How many oxygen atoms are needed to balance the equation?

• Four

• Six

• Eight

• Ten

What coefficient is finally placed in front of CrO3 to balance the equation?

• 5

• 2

• 3

• 4

What is the total number of oxygen atoms in the balanced equation?

• Sixteen

• Fourteen

• Twelve

• Ten

What is the final balanced equation for the decomposition of chromium trioxide?

• 2 CrO3 → Cr2O3 + 6 O2

• 4 CrO3 → 2 Cr2O3 + 6 O2

• 4 CrO3 → 2 Cr2O3 + 3 O2

• 2 CrO3 → Cr2O3 + 3 O2

What is the type of reaction discussed in the conclusion?

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement