Multiple Choice
Which of the following reactions results in the oxidation of sulfur?
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6. Chemical Quantities & Aqueous Reactions
Redox Reactions
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In the redox equation Ca2+ + 2e- → Ca, what process is occurring?
A
Decomposition of calcium ion
B
Formation of a calcium compound
C
Reduction of calcium ion to elemental calcium
D
Oxidation of elemental calcium to calcium ion
Verified step by step guidance1
Identify the species on both sides of the equation: Ca^{2+} on the left and Ca (elemental calcium) on the right.
Note the electrons (2e^-) are added to Ca^{2+}, indicating a gain of electrons.
Recall that gaining electrons is defined as reduction in redox chemistry.
Recognize that Ca^{2+} is being converted to elemental Ca by gaining 2 electrons, so the calcium ion is being reduced.
Conclude that the process occurring is the reduction of calcium ion to elemental calcium.
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