Answered

Hydrogen peroxide decomposes back to water and oxygen when exposed to air and light. When bought at a pharmacy for home use, hydrogen peroxide is sold in dark bottles that are labeled as a concentration of 3% by weight. A chemistry student wants to test the concentration of hydrogen peroxide that has been decanted to light and dark bottles, and exposed to air for 10, 20 and 30 hours. The concentration is tested by titration with potassium permanganate, and each sample is tested twice. Match the part of the experiment above that goes with each of the following terms. Group of answer choices
control
randomization
replication

Answer :

pstnonsonjoku

Answer: Testing the concentration of hydrogen peroxide decanted to dark bottles is the control experiment.

Testing the concentration of the species after exposure to air for 10,20 and 30 hours is randomization.

Testing each sample twice is replication

Explanation:

The control experiment is necessary for determination of reliability and statistical significance of results obtained. Replication helps to ensure accuracy and randomization aids us in making quality generalizations from experimental data.

Other Questions