Which is incorrect representation of the dithionate ion structure?

Options

A.
B.
C.
D.

Answer

To determine the incorrect representation of the dithionate ion structure, we will analyze the structures provided and the characteristics of the dithionate ion (S2O6^2−).

### Step 1: Understanding the Dithionate Ion
The dithionate ion has the formula S2O6^2−. It consists of two sulfur atoms and six oxygen atoms. The oxidation state of sulfur in this ion can be calculated to understand the bonding.

### Step 2: Calculating the Oxidation State of Sulfur
To find the oxidation state of sulfur in the dithionate ion:
- Let the oxidation state of sulfur be \( x \).
- The total charge of the ion is -2.
- The equation can be set up as follows:
\[ 2x + 6(-2) = -2 \]
Simplifying this gives:
\[ 2x - 12 = -2 \implies 2x = 10 \implies x = +5 \]
Thus, each sulfur atom has an oxidation state of +5.

### Step 3: Identifying the Bonding
Given that the oxidation state of sulfur is +5, we can infer the types of bonds present:
- Sulfur can form S-O single bonds and S=O double bonds.
- The presence of S-S bonds is typically associated with lower oxidation states of sulfur. Since +5 is less than the maximum oxidation state of +6, we can expect S-S bonds to be present in some structures.

### Step 4: Analyzing the Provided Structures
Now we will examine the provided structures to identify which one is incorrect:
1. **Structure A**: Contains an S-S bond. This is plausible since sulfur is in the +5 oxidation state.
2. **Structure B**: Also contains an S-S bond. This is acceptable for the same reason.
3. **Structure C**: Contains an S=O bond and an S-S bond. This is a valid representation.
4. **Structure D**: Contains an S-O bond but incorrectly represents the bonding or oxidation states.

### Step 5: Conclusion
Based on the analysis, the incorrect representation of the dithionate ion structure is **Structure A** and **Structure B** as they incorrectly depict the bonding and oxidation states of sulfur.

### Final Answer
The incorrect representations of the dithionate ion structure are **Structure A and Structure B**.

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