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.answer choices are: color/hours, 2, 6, 12, dark/light, 10/20/30 hours, and concentrationquestions: Response variable (s):Factor(s):Experimental Unit (s):Replication(s):Treatment(s):

Factors refer to explanatory variables tat are being studied in an experiment. They are manipulated in order to obtain a response (dependent) variable.

Treatments refer to a combination of factor levels in the experiment. Each factor has two or more levels

The experimental unit refers to the physical entities assigned at random to treatments during the experiment.

Replication refers to the number of times the same experiment is carried out. It enhances the reliability of the result of an experiment.

psm22415 psm22415 · Answer 2 · 2022-02-02T06:04:32+01:00

The concentration is tested by titration with potassium permanganate, and each sample is tested twice Replication-10/20/30 hours.

We have to determine

The concentration is tested by titration with potassium permanganate, and each sample is tested twice.

What is hydrogen peroxide?

Hydrogen peroxide is a chemical compound that is gaseous in nature. Its viscosity is greater than that of water.

Since it is unstable it slowly decomposes in the presence of light to form water and oxygen.

The control experiment is necessary for the 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.

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.

Replication refers to the number of times the same experiment is carried out. It enhances the reliability of the result of an experiment.

Testing each sample twice is replication.

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