What Is the Molarity of a Potassium Triiodide Solution,KI₃(aq),if 30

question 160

Multiple Choice

What is the molarity of a potassium triiodide solution,KI₃(aq) ,if 30.00 mL of the solution is required to completely react with 25.00 mL of a 0.200 M thiosulfate solution,K₂S₂O₃(aq) ? The chemical equation for the reaction is:
2 S₂O₃^2-(aq) + I₃^-(aq) → S₄O₆^2-(aq) + 3 I^-(aq) .

• A)0)0833 M
• B)0)120 M
• C)0)167 M
• D)0)333 M

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