In part 2 of the experiment, you will be analyzing a sample of household bleach. a 0.0854 g sample of household bleach is completely reacted with ki(s). the resulting solution is then titrated with 0.150 m nas2o3 solution. 0.890 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? a. 30.1% b. 96.5% c. 2.23% d. 5.82%

The correct answer is option d.

Explanation:

..[1]

..[2]

moles of sodium thiosulfate solution = n

Molarity of the sodium thiosulfate solution = 0.150 M

Volume of sodium thiosulfate solution used = 0.890 mL = 0.00089 L

According to reaction [2], 2 moles of sodium thiosulfate reacts with 1 mol .

Then , 0.0001335 mol of sodium thiosulfate will reacts with:

of

Moles of = 0.00006675 mol

According to reaction [1], 1 mol of is obatnied from 1 mol of NaClO.

Then 0.00006675 mol of will be obtained from:

Mass of 0.00006675 mol of NaClO=

0.00006675 mol × 74.44 g/mol = 0.00496887 g

Mass of sample = 0.0854 g

Percentage of NaClO in sample:

1 is the answer to this problem

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