Effect of Varying Concentration of H2O2

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  • Topic: Oxygen, Hydrogen peroxide, Chemistry
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Analyzing the effects of varying hydrogen peroxide (H2O2) concentrations on the volume of its drop

Jonah Jemina
IB Chemistry SL 11
Mr. Eastwood

Analyzing the effects of varying hydrogen peroxide (H2O2) concentrations on the volume of its drop Jonah Jemina

Introduction:
Hydrogen peroxide is a clear and colourless substance that has a strong oxidizing characteristic. From the books, “Hydrogen Peroxide: Medical Miracle”[1995] by Douglass and “Applications of hydrogen peroxide and derivatives” [1999] by Jones, hydrogen peroxide can be used in numerous industrial and domestic applications such as a disinfectant, an oxidizer, or treatment for cancer and other diseases. However, hydrogen peroxide can be toxic when highly concentrated in the body. Hydrogen peroxide can easily breakdown into water and a single oxygen molecule through exothermic reaction, but when stored properly at low concentrations, the solution becomes stable. As a molecule, hydrogen peroxide has a double bent structure and is also a polar covalent particle. Due to these properties, hydrogen peroxide can exert the three types of intermolecular forces: Van der Waal’s force, Dipole-dipole force, and hydrogen bonding. According to “Hydrogen Peroxide Background”[2005], 3% hydrogen peroxide is denser and has a higher boiling point than water.

For this experiment, the purpose will focus on how hydrogen peroxide concentrations of 0%, 0.75%, 1.5%, 2.25%, and 3% affects the volume of its drop. To obtain different concentrations, 3% hydrogen peroxide will be diluted with varying amounts of distilled water. Each different concentration will then be transferred into a buret in order to find the volume of 50 drops of each solution. This will be done in three trials in order to provide enough data to support a strong analysis and conclusion. By measuring 50 drops, the ability to analyze the volume of a drop will be significantly read using the buret to show the differences between different concentrations. A drop of each solution will also be observed by analyzing their relative diameter and height sizes on a flat surface table using a dropper pipette. Their relative sizes will not be measured but compared to one another by putting each drop closely on a flat surface table in three trials as well.

Research Question:
How do varying concentrations of hydrogen peroxide (0%, 0.75%, 1.5%, 2.25%, and 3%) affect the volume of its drop?

Hypothesis:
Hydrogen peroxide has stronger intermolecular forces compared to water because it can create exert two hydrogen bonds per molecule. Generally, the stronger the intermolecular forces are between molecules, the more they are attracted to one another resulting to a higher volume of a drop. Using this information, my hypothesis will be: As the concentration of hydrogen peroxide increases, the volume of its drop will also increase due to the increase of intermolecular forces between the molecules (by the increase of hydrogen peroxide molecules)

Variables:
In this experiment, the factor that will be manipulated is the concentrations of hydrogen peroxide. The hydrogen peroxide concentrations of 0%, 0.75%, 1.5%, 2.25%, and 3% will be the independent variables in this experiment that will be tested to find how they affect the volume of a drop. Each varying concentration of hydrogen peroxide will be analyzed by measuring the volume of 50 drops using a buret.

The dependent variable that will be measured is the volume of the drop of each varying concentration. The volume of a drop of each concentration will be measured by dividing the volume of 50 drops by 50, which will be done for each data collected. For qualitative observations, a drop of each solution will be placed on a flat surface table where their relative size and height will be observed.

The controlled variables will include the factors that will remain the same for each experimented concentrations. These will include: -same equipments...
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