In the experiment with the potato, the greenish-blue spot observed near the positive terminal is LEAST likely due to: A) Interaction of the electric current with compounds in the p... In the experiment with the potato, the greenish-blue spot observed near the positive terminal is LEAST likely due to: A) Interaction of the electric current with compounds in the potato. B) Deposition of a new metal forming on the electrode. C) Oxidation of the electrode materials. D) Corrosion of the copper wire used as an electrode.
Understand the Problem
The question is asking to identify the least likely cause of a greenish-blue spot near the positive terminal in an electrochemistry experiment using a potato as an electrolyte. We need to consider what chemical reactions are possible given the materials (potato compounds, electrode material, and electric current) and select the option that makes the least sense chemically.
Answer
The answer is B) Deposition of a new metal forming on the electrode, as it's the least likely cause.
The greenish-blue spot is least likely due to the deposition of a new metal forming on the electrode. While the other options (interaction of current, oxidation, and corrosion) can contribute to the color change due to electrochemical reactions, the formation of a new metal is not a typical process in this setup.
Answer for screen readers
The greenish-blue spot is least likely due to the deposition of a new metal forming on the electrode. While the other options (interaction of current, oxidation, and corrosion) can contribute to the color change due to electrochemical reactions, the formation of a new metal is not a typical process in this setup.
More Information
The greenish-blue color is due to the interaction of copper ions (from the wire) with the potato's compounds because of electrolysis.
Tips
It's important to understand the electrochemical processes occurring in the potato experiment, particularly oxidation and corrosion of the electrodes. Also, consider what is most likely to occur with the materials present.
Sources
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