What is the oxidation state change for the chromium in the following reaction14 H+ + Cr2O72- + 3 Zn → 3 Zn2+ + 2 Cr3+ + 7 H2OQuestion 5Select one:a.from +14 to +6b.from +7 to +3c.From +6 to +3d.from -2 to +3e.from +12 to +3
Question
What is the oxidation state change for the chromium in the following reaction14 H+ + Cr2O72- + 3 Zn → 3 Zn2+ + 2 Cr3+ + 7 H2OQuestion 5Select one:a.from +14 to +6b.from +7 to +3c.From +6 to +3d.from -2 to +3e.from +12 to +3
Solution
The oxidation state of chromium in Cr2O7^2- is +6 (since oxygen is usually -2, and the overall charge of the ion is -2, the total charge contributed by the two chromium atoms must be +12, so each chromium is +6). In Cr3+, the oxidation state of chromium is +3. Therefore, the oxidation state of chromium changes from +6 to +3 in this reaction. So, the correct answer is c. From +6 to +3.
Similar Questions
State the oxidation state of Chromium(Cr) in Cr2O3
What is the oxidation number of chromium in the Cr2O72- ion?Question 6Select one:a.+3b.+12c.+7d.+6e.+14
. Which statement accurately explains the reaction below?Cr2O72-(aq) + S2-(aq) → Cr3+(aq) + S(s)Chromium is oxidized from a +7 oxidation state to a +3 oxidation state.Chromium is reduced from a +7 oxidation state to a +3 oxidation state.Chromium is oxidized from a +6 oxidation state to a +3 oxidation state.Chromium is reduced from a +6 oxidation state to a +3 oxidation state.
Determine the oxidation state of each element in Cr(C2H3O2)3. Cr: C: H: O
oxidation state of chromium in K³CrO³ is
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.