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:

it have destructive character

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.