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Based on the Ellingham diagram, which statement is correct?
Metals with lower reduction potentials are more easily oxidized.
Metals with higher reduction potentials are more easily oxidized.
Metals with lower reduction potentials are more easily reduced.
Metals with higher reduction potentials are more easily reduced.
Answers (1)
The Ellingham diagram is a graphical representation that shows the thermodynamic stability of metal oxides as a function of temperature. It provides information about the feasibility of reducing metal oxides to their corresponding metals under different conditions.
The reduction potential of a metal is a measure of its ability to be reduced (gain electrons) in a chemical reaction. The higher the reduction potential, the greater the tendency of the metal to be reduced and lose oxygen.
In the context of the Ellingham diagram, the vertical position of the line representing a metal's oxide on the diagram indicates the reduction potential of the metal. Metals with higher reduction potentials have lines higher on the diagram, while metals with lower reduction potentials have lines lower on the diagram.
According to the diagram, metals with higher reduction potentials are more easily oxidized because they have a greater tendency to lose electrons and combine with oxygen to form metal oxides. Therefore, option b is correct: Metals with higher reduction potentials are more easily oxidized.
Conversely, metals with lower reduction potentials are less easily oxidized and more easily reduced because they have a lower tendency to lose electrons and form metal oxides. Therefore, option c is incorrect: Metals with lower reduction potentials are not more easily reduced.
In summary, the correct answer is b: Metals with higher reduction potentials are more easily oxidized.
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