Titrating 30

question 111

Multiple Choice

Titrating 30.00 mL of a saturated calcium iodate solution requires 28.91 mL of a 0.092 M solution of Na₂S₂O₃ according to the equation
IO₃^- + 6S₂O₃^2- + 6H⁺ → I^- + 2S₃O₆^2- + 3H₂O
Calculate K_sp for Ca(IO₃) ₂.

• A) 7.14 × 10^-8
• B) 6.97 × 10^-4
• C) 2.79 × 10^-3
• D) 1.61 × 10^-6
• E) none of these

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