1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Rashid [163]
3 years ago
7

In part 2 of the experiment, you will be analyzing a sample of household bleach. A 0.0854 g sample of household bleach is comple

tely 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%
Chemistry
1 answer:
marysya [2.9K]3 years ago
4 0

Answer:

The correct answer is option d.

Explanation:

NaClO(aq)+2KI(s)+H_2O(l)\rightarrow NaCl(aq)+I_2(aq)+2KOH(aq)..[1]

I_2(aq)+2Na_2S_2O_3(aq)\rightarrow 2NaI(aq)+Na_2S_4O_6(aq)..[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

n=Molarity\times Volume (L)

n=0.150 M\times 0.00089 L=0.0001335 mol

According to reaction [2], 2 moles of sodium thiosulfate reacts with 1 mol I_2.

Then , 0.0001335 mol of sodium thiosulfate will reacts with:

\frac{1}{2}\times 0.0001335 mol=0.00006675 mol of I_2

Moles of I_2 = 0.00006675 mol

According to reaction [1], 1 mol of I_2 is obatnied from 1 mol of NaClO.

Then 0.00006675 mol of I_2 will be obtained from:

\frac{1}{1}\times 0.00006675 mol=0.00006675 mol

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:

\frac{0.00496887 g}{0.0854 g}\times 100=5.82\%

You might be interested in
If a substance is covalent, then it likely will
kati45 [8]
Not be soluble in water
5 0
3 years ago
Read 2 more answers
Which statement is true about the particles of a solid when the solid
ira [324]

Answer:

2) Their kinetic energy increases.

Explanation:

The particles have more kinetic energy because they move around more when they are a liquid.

6 0
3 years ago
Read 2 more answers
Helpppppppppppppppppppppppppp
Artist 52 [7]
Conductor = Radiator , Frying pan , Ceramic baking dish
Insulator = Winter coat , Oven mitt and ice chest
5 0
3 years ago
1. Convert 67500 mg to the unit hg
Mice21 [21]

Answer:

0.675

Explanation:

4 0
3 years ago
What is the amount of moles for 12.0 g Ar?
Digiron [165]

if i am correct it shall be 12. because i am thinking, 1 mole = 1 ar.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following best explains why air is considered a natural resource?
    13·1 answer
  • HURRY PLS!<br> A wave has a wavelength of 915 meters. what is the frequency of the light?
    11·1 answer
  • What do you think happens to the air in the collid when ice cream melts ?
    5·2 answers
  • How many molecules are ther in 3.5 moles of Corbin dioxide
    7·1 answer
  • Which of the following would float in water at 25 ºC?
    15·1 answer
  • What scientific laws did Newton present in Principia?
    5·2 answers
  • What is the average pencil brand and type students use?
    12·2 answers
  • What is the difference between a strong electrolyte and a weak electrolyte
    12·1 answer
  • What should you use to compare one substance with another substance in a reaction?
    7·1 answer
  • NEED HELP! SCIENCE HW IS DUE IN 1 HOUR!!!!!!!!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!