Which of the following is a true statement concerning the balanced equation?
A.
The Cr_2O_7^{2-} reduces the S^{2-}
B.
The oxidation number of chromium changes from +7 to +3
C.
The oxidation number of the sulfur remains -2.
D.
The Cr_2O_7^{2-} oxidizes the S^{2-}
Exam No：AP Chemistry Problem Set 3 Year：2024 Question No：APChemistry2024AP0139
Answer:
D
Knowledge points:
4.9 Oxidation-Reduction (Redox) Reactions
Solution:
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