Multiple Choice
Redox reactions involve a transfer of which of the following from one atom to another?
49
views
6. Chemical Quantities & Aqueous Reactions
Redox Reactions
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In the redox reaction Cr2O7^{2-}(aq) + Cu^+(aq) → Cr^{3+}(aq) + Cu^{2+}(aq), which species is oxidized?
A
Cu^+
B
Cr^{3+}
C
Cr2O7^{2-}
D
Cu^{2+}
Verified step by step guidance1
Identify the oxidation states of the elements involved in the reaction to determine which species is oxidized and which is reduced.
For the dichromate ion, \(\mathrm{Cr_2O_7^{2-}}\), chromium typically has an oxidation state of +6. In the product \(\mathrm{Cr^{3+}}\), chromium has an oxidation state of +3, indicating a decrease in oxidation state (reduction).
For copper, \(\mathrm{Cu^+}\) has an oxidation state of +1, and in the product \(\mathrm{Cu^{2+}}\), copper has an oxidation state of +2, indicating an increase in oxidation state (oxidation).
Recall that oxidation is the loss of electrons (increase in oxidation state), and reduction is the gain of electrons (decrease in oxidation state).
Based on the changes in oxidation states, determine which species is oxidized by identifying the one whose oxidation state increases during the reaction.
1:53mWatch next
Master Oxidation and Reduction Reactions with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Redox Reactions practice set
Problem sets built by lead tutorsExpert video explanations