Thyroxine (C₁₅H₁₁I₄NO₄) is a hormone synthesized by thethyroid gland and used to control many metabolic functions in the body. A physiologist determines the mass percent of thyrox-ine in a thyroid extract by igniting 0.4332 g of extract with sodium carbonate, which converts the iodine to iodide. The io-dide is dissolved in water, and bromine and hydrochloric acid are added, which convert the iodide to iodate.(a) How many moles of iodate form per mole of thyroxine?(b) Excess bromine is boiled off and more iodide is added, whichreacts as shown in the following unbalanced equation: IO₃⁻(aq)+H⁺(aq)+I⁻(aq)→I₂(aq)+H₂O(l)How many moles of iodine are produced per mole of thyroxine?What are the oxidizing and reducing agents in the reaction?(c) The iodine reacts completely with 17.23 mL of 0.1000 Mthiosulfate as shown in the following unbalancedequation:I₂(aq)+S₂O₃²⁻(aq)+I⁻(aq)→S₄O₆²⁻(aq)What is the mass percent of thyroxine in the thyroid extract?
Thyroxine (C₁₅H₁₁I₄NO₄) is a hormone synthesized by thethyroid gland and used to control many
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