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26-03-2020
Chemistry

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In part 2 of the experiment, you will be analyzing a sample of household bleach. A 0.0800 g sample of household bleach is completely reacted with KI(s). The resulting solution is then titrated with 0.150 M NaS2O3 solution. 0.500 mL of the solution is required to reach the colorless endpoint. What is the mass percent of NaOCl (MM = 74.44 g/mole) in the bleach?

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mdimtihaz mdimtihaz

30-03-2020

Answer:

The mass percent of NaOCl = 3.48%

Explanation:

The mass percent of sodium hypochlorite in household bleach is determined by an oxidation-reduction titration with sodium thiosulfate.

In this reaction, the iodide is oxidized to form aqueous iodine, I₂ (aq) Iodine is not very soluble in water but in the presence of iodide ions, it immediately converts to the tri iodide ion (I₃⁻ ) which is soluble and forms a deep yellow solution.

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