What is the oxidation number of chromium in the Cr2O72- ion?Question 6Select one:a.+3b.+12c.+7d.+6e.+14
Question
What is the oxidation number of chromium in the Cr2O72- ion?Question 6Select one:a.+3b.+12c.+7d.+6e.+14
Solution
The oxidation number of chromium in the Cr2O7^2- ion can be calculated as follows:
- We know that the overall charge of the ion is -2.
- Oxygen usually has an oxidation number of -2.
- There are 7 oxygen atoms, so the total oxidation number for all oxygen atoms is -14.
- Let's assume the oxidation number of chromium is x. Since there are 2 chromium atoms, the total oxidation number for chromium is 2x.
- The sum of the oxidation numbers of all atoms in a molecule is equal to the charge of the molecule. Therefore, we can set up the following equation: 2x - 14 = -2.
- Solving for x gives us x = +6.
Therefore, the oxidation number of chromium in the Cr2O7^2- ion is +6. So, the correct answer is d. +6.
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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
. 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.
oxidation state of chromium in K³CrO³ is
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