The amount of I, (aq) in a solution can be determined by titration with a solution containing a known concentration of S,0 (aq) (thiosulfate ion). The determination is based on the net ionic equation 2s,0, (aq) + I5 (aq) s,0 (aq) + 31-(aq) Given that it requires 26.6 mL of 0.350 M Na, S,0,(aq) to titrate a 25.0 mL sample of I, (aq), calculate the molarity of I, (aq) in the solution. 1.12 [5] = M Incorrect

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**Determining the Concentration of \( \text{I}_3^- \) in Solution**

The concentration of \( \text{I}_3^- \) (aq) in a solution can be determined through titration with a solution containing a known concentration of \( \text{S}_2\text{O}_3^{2-} \) (aq) (thiosulfate ion). The determination is based on the net ionic equation:

\[ 2 \, \text{S}_2 \text{O}_3^{2-} \, (\text{aq}) + \text{I}_3^- \, (\text{aq}) \rightarrow \text{S}_4 \text{O}_6^{2-} \, (\text{aq}) + 3 \, \text{I}^- \, (\text{aq}) \]

Given the requirements:

- It takes 26.6 mL of 0.350 M \( \text{Na}_2\text{S}_2\text{O}_3 \) (aq) to titrate a 25.0 mL sample of \( \text{I}_3^- \) (aq).

Calculate the molarity of \( \text{I}_3^- \) (aq) in the solution.

**Solution Attempt:**

\[
[\text{I}_3^-] = \boxed{1.12} \, \text{M}
\]

**Note:** This answer is indicated as incorrect. Please refer to the correct calculation steps and verify the molarity.
Transcribed Image Text:**Determining the Concentration of \( \text{I}_3^- \) in Solution** The concentration of \( \text{I}_3^- \) (aq) in a solution can be determined through titration with a solution containing a known concentration of \( \text{S}_2\text{O}_3^{2-} \) (aq) (thiosulfate ion). The determination is based on the net ionic equation: \[ 2 \, \text{S}_2 \text{O}_3^{2-} \, (\text{aq}) + \text{I}_3^- \, (\text{aq}) \rightarrow \text{S}_4 \text{O}_6^{2-} \, (\text{aq}) + 3 \, \text{I}^- \, (\text{aq}) \] Given the requirements: - It takes 26.6 mL of 0.350 M \( \text{Na}_2\text{S}_2\text{O}_3 \) (aq) to titrate a 25.0 mL sample of \( \text{I}_3^- \) (aq). Calculate the molarity of \( \text{I}_3^- \) (aq) in the solution. **Solution Attempt:** \[ [\text{I}_3^-] = \boxed{1.12} \, \text{M} \] **Note:** This answer is indicated as incorrect. Please refer to the correct calculation steps and verify the molarity.
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