Hydrogen Peroxide Concentration Effects

The video tutorial explores the decomposition of hydrogen peroxide (H2O2) into water and oxygen, emphasizing how concentration affects the reaction rate. The experiment uses two different concentrations of hydrogen peroxide, with yeast as a catalyst, to observe the decomposition process. The results show that higher concentrations lead to more vigorous reactions, as evidenced by increased bubbling and temperature rise. The tutorial concludes that concentration significantly impacts the decomposition rate when a catalyst is present.

What is the chemical formula for hydrogen peroxide?

• H2O2

• H2O

• H2

• O2

Why is hydrogen peroxide rarely used in its pure form?

• It is too expensive.

• It is not available.

• It is powerful enough to be used as rocket fuel.

• It is not effective.

How does a higher concentration of hydrogen peroxide affect its decomposition?

• It has no effect.

• It speeds up the reaction.

• It stops the reaction.

• It slows down the reaction.

What catalyst is used in the experiment to speed up the decomposition of hydrogen peroxide?

• Sugar

• Salt

• Baking soda

• Yeast

What is the initial temperature of the 0.3% hydrogen peroxide solution?

• 20.5 degrees

• 19.5 degrees

• 18.5 degrees

• 21.5 degrees

How much did the temperature increase in the 0.3% hydrogen peroxide solution after one minute?

• 0.5 degrees

• 1.6 degrees

• 2.1 degrees

• 3.0 degrees

What was the initial temperature of the 3% hydrogen peroxide solution?

• 18.5 degrees

• 19.0 degrees

• 19.5 degrees

• 20.0 degrees

How much did the temperature increase in the 3% hydrogen peroxide solution after one minute?

• 10 degrees

• 12 degrees

• 14 degrees

• 16 degrees

What was observed about the bubbling in the 3% hydrogen peroxide solution compared to the 0.3% solution?

• It was less violent.

• It was the same.

• There was no bubbling.

• It was more violent.

What conclusion can be drawn about the effect of concentration on the decomposition of hydrogen peroxide?

• Higher concentration stops decomposition.

• Higher concentration results in more vigorous decomposition.

• Higher concentration results in slower decomposition.

• Higher concentration has no effect.