Hydrogen Peroxide Temperature Lab Report

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Effect of Yeast on Temperature on Hydrogen Peroxide Solution in Water
Khalid Al Sabeeh
Ms. Dobrin
11-G
Chemistry HL
Jan 5, 2015

Abstract:
Within this lab yeast was added to hydrogen peroxide solution in water. Temperature was the factor to be tested. In all trials, the initial and final, when yeast was added temperatures increased by 10˚C respectfully per trial. This is because hydrogen peroxide is unstable and when decomposed it increases the thermal temperature.
Introduction: Hydrogen peroxide (H202) is an often-unstable compound that has a similar chemical formula with water but with an extra oxygen (Cool Science). Hydrogen peroxide has many uses and benefits that include: fighting infections, alternative to bleach, removing mold, and sanitizing meat as well as many other functions (Andrea Harper). Hydrogen peroxide is often decomposed into oxygen and water but with usual environments it decomposes at a slow pace. Within the decomposition of hydrogen
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o For all three trails the H202 solution in water increase by 10˚C in terms of before and after yeast is added. o The third trial has the same trend of increase as the first two but begins and ends with a 1˚C higher than the previous trials.
Data processing:
Number of moles for the hydrogen peroxide (H202)
34.02 = Mr Mass = 20g x 0.03 = 0.6 0.6÷34.02 = 0.017 moles

Conclusion:
What was learned in this lab is temperature rises when a hydrogen peroxide solution in water is activated by yeast. The hypothesis is supported by the data. Referring to what was stated, the Hydrogen peroxide solution did change based yeast that activated the solution, many were similar in temperature. This is because the yeast decomposes the hydrogen peroxide into oxygen and water. This is because hydrogen peroxide is unstable and when decomposed increases in thermal

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